31912694380 has 24 divisors (see below), whose sum is σ = 76590466848. Its totient is φ = 10941495168.

The previous prime is 31912694251. The next prime is 31912694413. The reversal of 31912694380 is 8349621913.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31912694380.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113973769 + ... + 113974048.

It is an arithmetic number, because the mean of its divisors is an integer number (3191269452).

Almost surely, 2^31912694380 is an apocalyptic number.

It is an amenable number.

31912694380 is an abundant number, since it is smaller than the sum of its proper divisors (44677772468).

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

31912694380 is a wasteful number, since it uses less digits than its factorization.

31912694380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227947833 (or 227947831 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 31912694380 in words is "thirty-one billion, nine hundred twelve million, six hundred ninety-four thousand, three hundred eighty".