18733568808 has 32 divisors (see below), whose sum is σ = 46839916800. Its totient is φ = 6243723648.

The previous prime is 18733568783. The next prime is 18733568809. The reversal of 18733568808 is 80886533781.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18733568809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159348 + ... + 250716.

It is an arithmetic number, because the mean of its divisors is an integer number (1463747400).

Almost surely, 2^18733568808 is an apocalyptic number.

It is an amenable number.

18733568808 is an abundant number, since it is smaller than the sum of its proper divisors (28106347992).

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

18733568808 is a wasteful number, since it uses less digits than its factorization.

18733568808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99921 (or 99917 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 18733568808 in words is "eighteen billion, seven hundred thirty-three million, five hundred sixty-eight thousand, eight hundred eight".