18668203404 has 24 divisors (see below), whose sum is σ = 46121444208. Its totient is φ = 5856691200.

The previous prime is 18668203357. The next prime is 18668203427. The reversal of 18668203404 is 40430286681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45755197 + ... + 45755604.

It is an arithmetic number, because the mean of its divisors is an integer number (1921726842).

Almost surely, 2^18668203404 is an apocalyptic number.

It is an amenable number.

18668203404 is an abundant number, since it is smaller than the sum of its proper divisors (27453240804).

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

18668203404 is a wasteful number, since it uses less digits than its factorization.

18668203404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91510825 (or 91510823 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 18668203404 in words is "eighteen billion, six hundred sixty-eight million, two hundred three thousand, four hundred four".