19912

19912 is the natural number that follows 19911 and precedes 19913. It is even and composite.

Its prime factorization is 2^3 × 19 × 131, giving it 16 divisors: 1, 2, 4, 8, 19, 38, 76, 152, 131, 262, 524, 1048, 2489, 4978, 9956, 19912. The sum of all divisors is 39600, so the sum of the proper divisors is 19688, and thus 19912 is not a perfect number. The digital sum is 22, yielding a digital root of 4, so the number is not divisible by 9. In binary it is 100110111001000 and in hexadecimal 0x4DC8.

In common usage, there is no widely recognized significance attached to 19912; it is primarily encountered as an ordinary integer in arithmetic and number theory.