18877666976 has 48 divisors (see below), whose sum is σ = 42676159680. Its totient is φ = 8052065280.

The previous prime is 18877666939. The next prime is 18877666991. The reversal of 18877666976 is 67966677881.

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, 152441 + ... + 246968.

It is an arithmetic number, because the mean of its divisors is an integer number (889086660).

Almost surely, 2^18877666976 is an apocalyptic number.

18877666976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18877666976 is an abundant number, since it is smaller than the sum of its proper divisors (23798492704).

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

18877666976 is a wasteful number, since it uses less digits than its factorization.

18877666976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399637 (or 399629 counting only the distinct ones).

The product of its digits is 256048128, while the sum is 71.

The spelling of 18877666976 in words is "eighteen billion, eight hundred seventy-seven million, six hundred sixty-six thousand, nine hundred seventy-six".