19131992 has 16 divisors (see below), whose sum is σ = 39133800. Its totient is φ = 8696320.

The previous prime is 19131977. The next prime is 19132013. The reversal of 19131992 is 29913191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108617 + ... + 108792.

Almost surely, 2^19131992 is an apocalyptic number.

It is an amenable number.

19131992 is an abundant number, since it is smaller than the sum of its proper divisors (20001808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19131992 is a wasteful number, since it uses less digits than its factorization.

19131992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217426 (or 217422 counting only the distinct ones).

The product of its digits is 4374, while the sum is 35.

The square root of 19131992 is about 4374.0132601537. The cubic root of 19131992 is about 267.4566477042.

The spelling of 19131992 in words is "nineteen million, one hundred thirty-one thousand, nine hundred ninety-two".