31999000008 has 16 divisors (see below), whose sum is σ = 79997500080. Its totient is φ = 10666333328.

The previous prime is 31998999953. The next prime is 31999000021. The reversal of 31999000008 is 80000099913.

It is a self number, because there is not a number n which added to its sum of digits gives 31999000008.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666645810 + ... + 666645857.

It is an arithmetic number, because the mean of its divisors is an integer number (4999843755).

Almost surely, 2^31999000008 is an apocalyptic number.

It is an amenable number.

31999000008 is an abundant number, since it is smaller than the sum of its proper divisors (47998500072).

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

31999000008 is a wasteful number, since it uses less digits than its factorization.

31999000008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333291676 (or 1333291672 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The spelling of 31999000008 in words is "thirty-one billion, nine hundred ninety-nine million, eight", and thus it is an aban number.