18612331607 has 6 divisors (see below), whose sum is σ = 19422246168. Its totient is φ = 17802473964.

The previous prime is 18612331601. The next prime is 18612331609. The reversal of 18612331607 is 70613321681.

It is a de Polignac number, because none of the positive numbers 2^k-18612331607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18612331601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 640058 + ... + 668504.

It is an arithmetic number, because the mean of its divisors is an integer number (3237041028).

Almost surely, 2^18612331607 is an apocalyptic number.

18612331607 is a deficient number, since it is larger than the sum of its proper divisors (809914561).

18612331607 is an frugal number, since it uses more digits than its factorization.

18612331607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56917 (or 28470 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 18612331607 in words is "eighteen billion, six hundred twelve million, three hundred thirty-one thousand, six hundred seven".