18556065120 has 96 divisors (see below), whose sum is σ = 60993015552. Its totient is φ = 4733138432.

The previous prime is 18556065107. The next prime is 18556065137. The reversal of 18556065120 is 2156065581.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×18556065120² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 829362 + ... + 851441.

It is an arithmetic number, because the mean of its divisors is an integer number (635343912).

Almost surely, 2^18556065120 is an apocalyptic number.

18556065120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18556065120 is an abundant number, since it is smaller than the sum of its proper divisors (42436950432).

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

18556065120 is a wasteful number, since it uses less digits than its factorization.

18556065120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680844 (or 1680836 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 18556065120 in words is "eighteen billion, five hundred fifty-six million, sixty-five thousand, one hundred twenty".