18718974168 has 16 divisors (see below), whose sum is σ = 46797435480. Its totient is φ = 6239658048.

The previous prime is 18718974149. The next prime is 18718974179. The reversal of 18718974168 is 86147981781.

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, 389978605 + ... + 389978652.

Almost surely, 2^18718974168 is an apocalyptic number.

It is an amenable number.

18718974168 is an abundant number, since it is smaller than the sum of its proper divisors (28078461312).

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

18718974168 is a wasteful number, since it uses less digits than its factorization.

18718974168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779957266 (or 779957262 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 60.

The spelling of 18718974168 in words is "eighteen billion, seven hundred eighteen million, nine hundred seventy-four thousand, one hundred sixty-eight".