18857575856 has 40 divisors (see below), whose sum is σ = 44212304160. Its totient is φ = 7606416384.

The previous prime is 18857575837. The next prime is 18857575927. The reversal of 18857575856 is 65857575881.

It is a junction number, because it is equal to n+sod(n) for n = 18857575792 and 18857575801.

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, 4950191 + ... + 4953998.

It is an arithmetic number, because the mean of its divisors is an integer number (1105307604).

Almost surely, 2^18857575856 is an apocalyptic number.

18857575856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18857575856 is an abundant number, since it is smaller than the sum of its proper divisors (25354728304).

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

18857575856 is a wasteful number, since it uses less digits than its factorization.

18857575856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9904221 (or 9904215 counting only the distinct ones).

The product of its digits is 94080000, while the sum is 65.

The spelling of 18857575856 in words is "eighteen billion, eight hundred fifty-seven million, five hundred seventy-five thousand, eight hundred fifty-six".