18320953924 has 96 divisors (see below), whose sum is σ = 41839822080. Its totient is φ = 6812024832.

The previous prime is 18320953921. The next prime is 18320953933. The reversal of 18320953924 is 42935902381.

It is not an unprimeable number, because it can be changed into a prime (18320953921) 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, 5747059 + ... + 5750245.

It is an arithmetic number, because the mean of its divisors is an integer number (435831480).

Almost surely, 2^18320953924 is an apocalyptic number.

18320953924 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 18320953924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20919911040).

18320953924 is an abundant number, since it is smaller than the sum of its proper divisors (23518868156).

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

18320953924 is a wasteful number, since it uses less digits than its factorization.

18320953924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157 (or 4155 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 18320953924 in words is "eighteen billion, three hundred twenty million, nine hundred fifty-three thousand, nine hundred twenty-four".