18551805008 has 20 divisors (see below), whose sum is σ = 39211770048. Its totient is φ = 8432638560.

The previous prime is 18551804993. The next prime is 18551805017. The reversal of 18551805008 is 80050815581.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 52703816 + ... + 52704167.

Almost surely, 2^18551805008 is an apocalyptic number.

It is an amenable number.

18551805008 is an abundant number, since it is smaller than the sum of its proper divisors (20659965040).

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

18551805008 is a wasteful number, since it uses less digits than its factorization.

18551805008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105408002 (or 105407996 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 41.

The spelling of 18551805008 in words is "eighteen billion, five hundred fifty-one million, eight hundred five thousand, eight".