18722538120 has 512 divisors, whose sum is σ = 68000808960. Its totient is φ = 4098124800.

The previous prime is 18722538119. The next prime is 18722538137. The reversal of 18722538120 is 2183522781.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 147421497 + ... + 147421623.

It is an arithmetic number, because the mean of its divisors is an integer number (132814080).

Almost surely, 2^18722538120 is an apocalyptic number.

18722538120 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 18722538120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34000404480).

18722538120 is an abundant number, since it is smaller than the sum of its proper divisors (49278270840).

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

18722538120 is a wasteful number, since it uses less digits than its factorization.

18722538120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 18722538120 in words is "eighteen billion, seven hundred twenty-two million, five hundred thirty-eight thousand, one hundred twenty".