18680764172 has 12 divisors (see below), whose sum is σ = 37361528400. Its totient is φ = 8006041776.

The previous prime is 18680764159. The next prime is 18680764199. The reversal of 18680764172 is 27146708681.

It is a happy number.

18680764172 is an admirable number.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18680764172.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333585047 + ... + 333585102.

It is an arithmetic number, because the mean of its divisors is an integer number (3113460700).

Almost surely, 2^18680764172 is an apocalyptic number.

It is an amenable number.

18680764172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18680764172 is a wasteful number, since it uses less digits than its factorization.

18680764172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667170160 (or 667170158 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 18680764172 in words is "eighteen billion, six hundred eighty million, seven hundred sixty-four thousand, one hundred seventy-two".