18956957120 has 56 divisors (see below), whose sum is σ = 45196469424. Its totient is φ = 7573508096.

The previous prime is 18956957119. The next prime is 18956957137. The reversal of 18956957120 is 2175965981.

It is a happy number.

It is a congruent number.

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, 228824 + ... + 300456.

Almost surely, 2^18956957120 is an apocalyptic number.

18956957120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18956957120 is an abundant number, since it is smaller than the sum of its proper divisors (26239512304).

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

18956957120 is an equidigital number, since it uses as much as digits as its factorization.

18956957120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72477 (or 72467 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 18956957120 in words is "eighteen billion, nine hundred fifty-six million, nine hundred fifty-seven thousand, one hundred twenty".