16

16 = 2⁴. 16 is a perfect fourth power.

16 is the smallest number with two representations as a sum of two distinct primes: 16 = 3 + 13 = 5 + 11.

16 = 1 + 3 + 5 + 7.

16 is 22 in base 7.

16 can be partitioned in 231 ways.

There are 16 ounces in a pound.

Each player in a game of chess uses 16 pieces.

Source: WolframAlpha