31431930684 has 48 divisors (see below), whose sum is σ = 91438346496. Its totient is φ = 8164137600.

The previous prime is 31431930671. The next prime is 31431930707. The reversal of 31431930684 is 48603913413.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 17007697 + ... + 17009544.

It is an arithmetic number, because the mean of its divisors is an integer number (1904965552).

Almost surely, 2^31431930684 is an apocalyptic number.

It is an amenable number.

31431930684 is an abundant number, since it is smaller than the sum of its proper divisors (60006415812).

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

31431930684 is a wasteful number, since it uses less digits than its factorization.

31431930684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34017266 (or 34017264 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 31431930684 in words is "thirty-one billion, four hundred thirty-one million, nine hundred thirty thousand, six hundred eighty-four".