Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

Unique Properties of 16

  • 16 is the number of vertices of a tesseract
  • 16 is the only number of the form xy=yx with different x and y
  • 16 is the smallest prime power of a prime power of a prime
  • 16 is the base of the hexadecimal number system, which is used extensively in computer science
  • 16 is the smallest short leg in a primitive Pythagorean triangle whose three side lengths are composite integers
  • 16 is the smallest number which is the sum of two distinct odd primes in two ways: 16 = 3 + 13 = 5 + 11
  • 16 is the only 2-digit number n such that nn ends with two copies of n: 1616 = 18446744073709551616
  • 16 is the largest number n such that every set of n consecutive integers contain a number which is relatively prime to all the others

Rare Properties of 16

Power of 2

Common Properties of 16

Lazy caterer