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|14th (fourteenth) |
|2 × 7 |
|1, 2, 7, 14 |
14 (fourteen /fɔərˈtiːn/) is the natural number following 13 and preceding 15.
In speech, the numbers 14 and 40 are often confused. When carefully enunciated, they differ in which syllable is stressed: 14 i/fɔərˈtiːn/ vs 40 /ˈfɔrti/. When being related to the word "four" (4), 14 is spelled "fourteen", and not "forteen". However, in dates such as 1492 or when contrasting numbers in the teens, such as 13, 14, 15, the stress shifts to the first syllable: 14 /ˈfɔərtiːn/.
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- 1 In mathematics
- 2 In science
- 3 In religion
- 4 Age 14
- 5 In Sports
- 6 In other fields
- 7 References
Fourteen is a composite number, its divisors being 1, 2, 7 and 14.
14 is the 3rd discrete semiprime (2.7) and the 3rd member of the (2.q) discrete semiprime family. The number following 14—15—is itself a discrete semiprime and this is the first such pair of discrete semiprimes. The next example is the pair commencing 21.
The aliquot sum σ(n) of 14 is 10, also a discrete semiprime and this is again the first example of a discrete semiprime having an aliquot sum in the same form. 14 has an aliquot sequence of 6 members (14,10,8,7,1,0) 14 is the third composite number in the 7-aliquot tree.
Fourteen is itself the Aliquot sum of two numbers; the discrete semiprime 22, and the square number 169.
Fourteen is the base of the tetradecimal notation.
In base fifteen and higher bases (such as hexadecimal), fourteen is represented as E.
Fourteen is the sum of the first three squares, which makes it a square pyramidal number.
This number is the lowest even n for which the equation φ(x) = n has no solution, making it the first even nontotient (see Euler''s totient function).
14 is a Catalan number, the only semiprime among all Catalan numbers.
Take a set of real numbers and apply the closure and complement operations to it in any possible sequence. At most 14 distinct sets can be generated in this way. This holds even if the reals are replaced by a more general topological space. See Kuratowski''s closure-complement problem.
Fourteen is a Keith number in base 10: 1, 4, 5, 9, 14, 23, 37, 60, 97, 157...
Fourteen is an open meandric number.
Fourteen is a Companion Pell number.
According to the Shapiro inequality 14 is the least number n such that there exist such that
There are fourteen possible Bravais lattices that fill three-dimensional space.
The cuboctahedron, the truncated cube, and the truncated octahedron each have fourteen faces. The rhombic dodecahedron, which tessellates 3-dimensional space and is the dual of the cuboctahedron, has fourteen vertices. The truncated octahedron, which also tessellates 3-dimensional space, is the only permutohedron.
In science Chemistry
- The atomic number of silicon
- The approximate atomic weight of nitrogen
- The maximum number of electrons that can fit in an f sublevel
- Messier object M14, a magnitude 9.5 globular cluster in the constellation Ophiuchus
- The New General Catalogue object
- The number of Stations of the Cross.
- The Fourteen Holy Helpers were a group of saints formerly venerated together by Roman Catholics.
- The number of muqatta''at in the Qur''an.
- The number of Infalliables (Masoomeen) in Shia Ithna-Asheri Islam.
- The number of pieces the body of Osiris was torn into by his fratricidal brother Set.
- The number of years of Rama''s exile in the forests in Hinduism.
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- Age 14 is the earliest that the emancipation of minors can occur in the U.S.
- Minimum age a person can purchase, rent or buy tickets to a 14A rated movie in Canada without an adult. Ratings are provincial, so ratings may vary. A movie can be 14A in one or some provinces and PG in other provinces. A movie can also be rated 14A in one or some provinces and 18A in other provinces. Quebec has a different rating system for films.
- Youngest age in Canada a person can watch a 14+ rated show without consent from a legal guardian.
- Minimum age at which one can view, rent, purchase, or buy tickets to an 18A rated movie with an accompanying adult in the Canadian provinces of the Maritimes and Manitoba.
- Minimum age at which one can work in many U.S states. Some require parental consent while others don''t.
- Minimum age at which one can work in most Australian states with parent''s consent.
- Minimum age at which one can drive a vehicle in the U.S. with a driver''s license (with supervision of an adult over 18 years of age, and with a valid, unmarked driver''s license, and at least 365 days of experience driving an actual automobile)
- The minimum age limit to drive a 50cc motorbike in Italy.
- The G-14 is a now-defunct union of eighteen football clubs.
- In Association football: The number 14, was the number for Johan Cruyff. Therefore he is often associated with that number and the football club AFC Ajax promised (in 2007) in his honour never to use it again.
- In Major League Baseball, the American League has had 14 teams from 1977 to 2012, and the National League had 14 teams from 1993 to 1997.
- In rugby union:
- The starting right wing wears the 14 shirt.
- The Top 14 is the highest-level league in French rugby union.
- The Southern Hemisphere competition now known as Super Rugby was known from 2006 through 2010, an era in which it had 14 teams, as Super 14.
- In the NASCAR Sprint Cup Series, the #14 car is currently owned by Stewart Haas Racing. Since 2009, it has been driven by team co-owner Tony Stewart.
- In Thoroughbred horse racing:
- The following major races have a maximum field of 14 runners:
- The Preakness Stakes and Belmont Stakes, the final two legs of the U.S. Triple Crown.
- All of the Breeders'' Cup races except for the Dirt Mile, Juvenile Fillies, and Juvenile Fillies Turf (limited to 12).
- In the PGA:
- A player can have no more than 14 clubs in the bag.
In other fields
- The jersey number 14 has been retired by several North American sports teams in honor of past playing greats or other key figures:
- In Major League Baseball:
- The Boston Red Sox, for Hall of Famer Jim Rice.
- The Chicago Cubs, for Hall of Famer Ernie Banks.
- The Cleveland Indians, for Hall of Fame player Larry Doby, who also managed the team.
- The Minnesota Twins, for Kent Hrbek.
- The New York Mets, for Gil Hodges, who both played for and managed the team.
- The Philadelphia Phillies, for Hall of Famer Jim Bunning.
- The St. Louis Cardinals, for Ken Boyer.
- The Seattle Mariners have yet to retire any numbers, but have not issued #14 since Lou Piniella, manager from 1993 to 2002, left the team.
- The Cincinnati Reds have taken #14 out of circulation since Pete Rose accepted a place on MLB''s banned list in 1989 for allegedly betting on games (which he would admit to in 2004). Because of the ban, the Reds cannot retire the number for Rose during his lifetime; they have since only issued the number to his son.
- In the NBA:
- The Boston Celtics, for Hall of Famer Bob Cousy.
- The Golden State Warriors, for Tom Meschery, who played for the team in its past incarnations as the Philadelphia and San Francisco Warriors.
- The Milwaukee Bucks, for Jon McGlocklin.
- The Portland Trail Blazers, for Lionel Hollins.
- The Sacramento Kings, for Hall of Famer Oscar Robertson, who played for the team when it was known as the Cincinnati Royals.
- The Utah Jazz, for Jeff Hornacek.
- In the NFL:
- The Cleveland Browns, for Hall of Famer Otto Graham.
- The Green Bay Packers, for Hall of Famer Don Hutson.
- The New York Giants, for Hall of Famer Y. A. Tittle.
- The San Diego Chargers, for Hall of Famer Dan Fouts.
- In the NHL:
- The Buffalo Sabres, for René Robert.
- The number of days in a fortnight.
- In traditional British units of weight, the number of pounds in a stone.
- A number ''encoded'' in much of the music of Johann Sebastian Bach. Bach may have considered this number a sort of signature, since given A = 1, B = 2, C = 3, etc., then B + A + C + H = 14. (
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