18807913320 has 128 divisors (see below), whose sum is σ = 64518854400. Its totient is φ = 4296646656.

The previous prime is 18807913301. The next prime is 18807913321. The reversal of 18807913320 is 2331970881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (18807913321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1934712 + ... + 1944408.

It is an arithmetic number, because the mean of its divisors is an integer number (504053550).

Almost surely, 2^18807913320 is an apocalyptic number.

18807913320 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 18807913320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32259427200).

18807913320 is an abundant number, since it is smaller than the sum of its proper divisors (45710941080).

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

18807913320 is a wasteful number, since it uses less digits than its factorization.

18807913320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12027 (or 12023 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 18807913320 in words is "eighteen billion, eight hundred seven million, nine hundred thirteen thousand, three hundred twenty".