31992000012 has 36 divisors (see below), whose sum is σ = 92421334096. Its totient is φ = 9140571360.

The previous prime is 31992000011. The next prime is 31992000017. The reversal of 31992000012 is 21000029913.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 31992000012.

It is not an unprimeable number, because it can be changed into a prime (31992000011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63475939 + ... + 63476442.

Almost surely, 2^31992000012 is an apocalyptic number.

It is an amenable number.

31992000012 is an abundant number, since it is smaller than the sum of its proper divisors (60429334084).

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

31992000012 is a wasteful number, since it uses less digits than its factorization.

31992000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126952398 (or 126952393 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

Adding to 31992000012 its reverse (21000029913), we get a palindrome (52992029925).

The spelling of 31992000012 in words is "thirty-one billion, nine hundred ninety-two million, twelve", and thus it is an aban number.