18375861504 has 864 divisors, whose sum is σ = 69054757632. Its totient is φ = 4217241600.

The previous prime is 18375861503. The next prime is 18375861529. The reversal of 18375861504 is 40516857381.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18375861503) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 346714342 + ... + 346714394.

It is an arithmetic number, because the mean of its divisors is an integer number (79924488).

Almost surely, 2^18375861504 is an apocalyptic number.

18375861504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18375861504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34527378816).

18375861504 is an abundant number, since it is smaller than the sum of its proper divisors (50678896128).

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

18375861504 is a wasteful number, since it uses less digits than its factorization.

18375861504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 18375861504 in words is "eighteen billion, three hundred seventy-five million, eight hundred sixty-one thousand, five hundred four".