31957918002 has 24 divisors (see below), whose sum is σ = 69363868860. Its totient is φ = 10633914240.

The previous prime is 31957918001. The next prime is 31957918009. The reversal of 31957918002 is 20081975913.

It can be written as a sum of positive squares in 2 ways, for example, as 27024400881 + 4933517121 = 164391^2 + 70239^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31957918001) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1549899 + ... + 1570382.

Almost surely, 2^31957918002 is an apocalyptic number.

31957918002 is an abundant number, since it is smaller than the sum of its proper divisors (37405950858).

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

31957918002 is a wasteful number, since it uses less digits than its factorization.

31957918002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120858 (or 3120855 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 31957918002 in words is "thirty-one billion, nine hundred fifty-seven million, nine hundred eighteen thousand, two".