18520766880 has 192 divisors, whose sum is σ = 72736247808. Its totient is φ = 3848463360.

The previous prime is 18520766863. The next prime is 18520766893. The reversal of 18520766880 is 8866702581.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213592 + ... + 287511.

It is an arithmetic number, because the mean of its divisors is an integer number (378834624).

Almost surely, 2^18520766880 is an apocalyptic number.

18520766880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18520766880 is an abundant number, since it is smaller than the sum of its proper divisors (54215480928).

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

18520766880 is a wasteful number, since it uses less digits than its factorization.

18520766880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501139 (or 501131 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 18520766880 in words is "eighteen billion, five hundred twenty million, seven hundred sixty-six thousand, eight hundred eighty".