31930468018 has 8 divisors (see below), whose sum is σ = 48138828012. Its totient is φ = 15884192016.

The previous prime is 31930468001. The next prime is 31930468027. The reversal of 31930468018 is 81086403913.

It can be written as a sum of positive squares in 2 ways, for example, as 28164559329 + 3765908689 = 167823^2 + 61367^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40520505 + ... + 40521292.

Almost surely, 2^31930468018 is an apocalyptic number.

31930468018 is a deficient number, since it is larger than the sum of its proper divisors (16208359994).

31930468018 is a wasteful number, since it uses less digits than its factorization.

31930468018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81041996.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 31930468018 in words is "thirty-one billion, nine hundred thirty million, four hundred sixty-eight thousand, eighteen".