18786051380772 has 72 divisors (see below), whose sum is σ = 51363124762040. Its totient is φ = 5755081881600.

The previous prime is 18786051380731. The next prime is 18786051380779. The reversal of 18786051380772 is 27708315068781.

18786051380772 is a `hidden beast` number, since 1 + 8 + 7 + 8 + 605 + 13 + 8 + 0 + 7 + 7 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 125673086016 + 18660378294756 = 354504^2 + 4319766^2 .

It is not an unprimeable number, because it can be changed into a prime (18786051380779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87537229 + ... + 87751572.

Almost surely, 2^{18786051380772} is an apocalyptic number.

18786051380772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18786051380772 is an abundant number, since it is smaller than the sum of its proper divisors (32577073381268).

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

18786051380772 is a wasteful number, since it uses less digits than its factorization.

18786051380772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175289053 (or 175289048 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 63.

The spelling of 18786051380772 in words is "eighteen trillion, seven hundred eighty-six billion, fifty-one million, three hundred eighty thousand, seven hundred seventy-two".