18372856320 has 1280 divisors, whose sum is σ = 84474593280. Its totient is φ = 3678732288.

The previous prime is 18372856319. The next prime is 18372856331. The reversal of 18372856320 is 2365827381.

18372856320 is a `hidden beast` number, since 1 + 8 + 3 + 7 + 2 + 8 + 5 + 632 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1280).

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 144668097 + ... + 144668223.

It is an arithmetic number, because the mean of its divisors is an integer number (65995776).

Almost surely, 2^18372856320 is an apocalyptic number.

18372856320 is a gapful number since it is divisible by the number (10) 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 18372856320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42237296640).

18372856320 is an abundant number, since it is smaller than the sum of its proper divisors (66101736960).

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

18372856320 is a wasteful number, since it uses less digits than its factorization.

18372856320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

18372856320 divided by its product of nonzero digits (483840) gives a palindrome (37973).

The spelling of 18372856320 in words is "eighteen billion, three hundred seventy-two million, eight hundred fifty-six thousand, three hundred twenty".