18657630880 has 48 divisors (see below), whose sum is σ = 50375606400. Its totient is φ = 6396901632.

The previous prime is 18657630869. The next prime is 18657630913. The reversal of 18657630880 is 8803675681.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8328180 + ... + 8330419.

It is an arithmetic number, because the mean of its divisors is an integer number (1049491800).

Almost surely, 2^18657630880 is an apocalyptic number.

18657630880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18657630880 is an abundant number, since it is smaller than the sum of its proper divisors (31717975520).

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

18657630880 is a wasteful number, since it uses less digits than its factorization.

18657630880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16658621 (or 16658613 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 18657630880 in words is "eighteen billion, six hundred fifty-seven million, six hundred thirty thousand, eight hundred eighty".