18172965120 has 72 divisors (see below), whose sum is σ = 58039919616. Its totient is φ = 4846123008.

The previous prime is 18172965077. The next prime is 18172965157. The reversal of 18172965120 is 2156927181.

It is a super-2 number, since 2×18172965120² (a number of 21 digits) contains 22 as substring.

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, 2362432 + ... + 2370111.

Almost surely, 2^18172965120 is an apocalyptic number.

18172965120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18172965120 is an abundant number, since it is smaller than the sum of its proper divisors (39866954496).

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

18172965120 is an equidigital number, since it uses as much as digits as its factorization.

18172965120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732567 (or 4732553 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 18172965120 in words is "eighteen billion, one hundred seventy-two million, nine hundred sixty-five thousand, one hundred twenty".