18388573045038 has 48 divisors (see below), whose sum is σ = 45689014346976. Its totient is φ = 5235946678080.

The previous prime is 18388573045019. The next prime is 18388573045091. The reversal of 18388573045038 is 83054037588381.

18388573045038 is a `hidden beast` number, since 1 + 8 + 3 + 8 + 8 + 573 + 0 + 4 + 50 + 3 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249009253 + ... + 249083088.

It is an arithmetic number, because the mean of its divisors is an integer number (951854465562).

Almost surely, 2^{18388573045038} is an apocalyptic number.

18388573045038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18388573045038 is an abundant number, since it is smaller than the sum of its proper divisors (27300441301938).

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

18388573045038 is a wasteful number, since it uses less digits than its factorization.

18388573045038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498092649 (or 498092646 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 63.

The spelling of 18388573045038 in words is "eighteen trillion, three hundred eighty-eight billion, five hundred seventy-three million, forty-five thousand, thirty-eight".