31506693996 has 48 divisors (see below), whose sum is σ = 76068195840. Its totient is φ = 10137744960.

The previous prime is 31506693989. The next prime is 31506694019. The reversal of 31506693996 is 69939660513.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2126205 + ... + 2140971.

It is an arithmetic number, because the mean of its divisors is an integer number (1584754080).

Almost surely, 2^31506693996 is an apocalyptic number.

It is an amenable number.

31506693996 is an abundant number, since it is smaller than the sum of its proper divisors (44561501844).

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

31506693996 is a wasteful number, since it uses less digits than its factorization.

31506693996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20934 (or 20932 counting only the distinct ones).

The product of its (nonzero) digits is 7085880, while the sum is 57.

The spelling of 31506693996 in words is "thirty-one billion, five hundred six million, six hundred ninety-three thousand, nine hundred ninety-six".