16 (sixteen) is the natural number following 15 and preceding 17.
| Template:Numbers 10s | |
| Cardinal | sixteen |
| Ordinal | sixteenth |
| Factorization | |
| Roman numeral | XVI |
| Binary | 10000 |
| Hexadecimal | 10 |
In mathematics
Sixteen is a composite number, its proper divisors being 1, 2, 4 and 8. It is the fourth power of two.
Sixteen is the only integer that equals and , for some unequal integral m and n (m=4, n=2, or vice versa). It has this property because . It is also equal to 2↑↑3, (using Knuth's up-arrow notation).
16 is a centered pentagonal number.
16 is the base of the hexadecimal number system, which is used extensively with computers.
In human affairs: Age 16
16 is the age limit for being allowed a driver's license in many US states and in Canada, and for getting an adult job in most states and provinces in those countries (as well as, complementarily, dropping out of school). It is also the age of consent for many jurisdictions around the world.
For its coming-of-age signification, it has inspired the titles of many songs, such as "Happy Birthday Sweet Sixteen", "You're Sixteen, You're Beautiful and You're Mine", "Sweet Little Sixteen" and "Sixteen Candles", the last of which was borrowed as the title of a John Hughes movie.
In other fields
There are sixteen ounces in a pound.
There are sixteen different personality types in all in the Myers-Briggs classification system.
A note played for one-sixteenth the duration of a whole note is called a semiquaver.
In the 16-bit era, 16-bit microprocessor ran 16-bit applications.
- The atomic number of sulfur
- Sixteen Kingdoms, part of Chinese history
- Canada's Yellowhead Highway is designated as highway sixteen.
- I-16 is the designation for a US interstate highway in Georgia.
- Historical years: 16 A.D., 16 B.C., or 1916
- The fighter jet, the F-16 Fighting Falcon.