18316505232900 has 144 divisors (see below), whose sum is σ = 67296197073280. Its totient is φ = 4186629763200.

The previous prime is 18316505232899. The next prime is 18316505232989. The reversal of 18316505232900 is 923250561381.

18316505232900 is a `hidden beast` number, since 1 + 8 + 31 + 6 + 5 + 0 + 523 + 2 + 90 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 484544731 + ... + 484582530.

Almost surely, 2^{18316505232900} is an apocalyptic number.

18316505232900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18316505232900 is an abundant number, since it is smaller than the sum of its proper divisors (48979691840380).

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

18316505232900 is a wasteful number, since it uses less digits than its factorization.

18316505232900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969127291 (or 969127278 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 18316505232900 in words is "eighteen trillion, three hundred sixteen billion, five hundred five million, two hundred thirty-two thousand, nine hundred".