31670520972 has 12 divisors (see below), whose sum is σ = 73897882296. Its totient is φ = 10556840320.

The previous prime is 31670520919. The next prime is 31670520977. The reversal of 31670520972 is 27902507613.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31670520977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319605029 + ... + 1319605052.

It is an arithmetic number, because the mean of its divisors is an integer number (6158156858).

Almost surely, 2^31670520972 is an apocalyptic number.

It is an amenable number.

31670520972 is an abundant number, since it is smaller than the sum of its proper divisors (42227361324).

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

31670520972 is a wasteful number, since it uses less digits than its factorization.

31670520972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639210088 (or 2639210086 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 31670520972 in words is "thirty-one billion, six hundred seventy million, five hundred twenty thousand, nine hundred seventy-two".