18516972910720 has 64 divisors (see below), whose sum is σ = 44270849635200. Its totient is φ = 7406168194048.

The previous prime is 18516972910679. The next prime is 18516972910741. The reversal of 18516972910720 is 2701927961581.

It is a tau number, because it is divible by the number of its divisors (64).

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, 6464841 + ... + 8878519.

It is an arithmetic number, because the mean of its divisors is an integer number (691732025550).

Almost surely, 2^{18516972910720} is an apocalyptic number.

18516972910720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18516972910720 is an abundant number, since it is smaller than the sum of its proper divisors (25753876724480).

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

18516972910720 is a wasteful number, since it uses less digits than its factorization.

18516972910720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425685 (or 2425673 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 58.

The spelling of 18516972910720 in words is "eighteen trillion, five hundred sixteen billion, nine hundred seventy-two million, nine hundred ten thousand, seven hundred twenty".