31020938072 has 16 divisors (see below), whose sum is σ = 58168917240. Its totient is φ = 15509226816.

The previous prime is 31020938033. The next prime is 31020938077. The reversal of 31020938072 is 27083902013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020938077) 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, 44498 + ... + 253025.

Almost surely, 2^31020938072 is an apocalyptic number.

It is an amenable number.

31020938072 is a deficient number, since it is larger than the sum of its proper divisors (27147979168).

31020938072 is a wasteful number, since it uses less digits than its factorization.

31020938072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310562 (or 310558 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 31020938072 in words is "thirty-one billion, twenty million, nine hundred thirty-eight thousand, seventy-two".