31620713007 has 32 divisors (see below), whose sum is σ = 49871808000. Its totient is φ = 17633227392.

The previous prime is 31620712999. The next prime is 31620713087. The reversal of 31620713007 is 70031702613.

It is not a de Polignac number, because 31620713007 - 2³ = 31620712999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31620713087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 910632 + ... + 944717.

It is an arithmetic number, because the mean of its divisors is an integer number (1558494000).

Almost surely, 2^31620713007 is an apocalyptic number.

31620713007 is a deficient number, since it is larger than the sum of its proper divisors (18251094993).

31620713007 is a wasteful number, since it uses less digits than its factorization.

31620713007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855407.

The product of its (nonzero) digits is 5292, while the sum is 30.

The spelling of 31620713007 in words is "thirty-one billion, six hundred twenty million, seven hundred thirteen thousand, seven".