18885986331600 has 120 divisors (see below), whose sum is σ = 60506490026272. Its totient is φ = 5035565376000.

The previous prime is 18885986331581. The next prime is 18885986331677. The reversal of 18885986331600 is 613368958881.

It is a Cunningham number, because it is equal to 4345801²-1.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7605150 + ... + 9778050.

Almost surely, 2^{18885986331600} is an apocalyptic number.

18885986331600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18885986331600 is an abundant number, since it is smaller than the sum of its proper divisors (41620503694672).

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

18885986331600 is a wasteful number, since it uses less digits than its factorization.

18885986331600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180165 (or 2180154 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 66.

The spelling of 18885986331600 in words is "eighteen trillion, eight hundred eighty-five billion, nine hundred eighty-six million, three hundred thirty-one thousand, six hundred".