18872238924 has 120 divisors (see below), whose sum is σ = 61509600768. Its totient is φ = 4901873760.

The previous prime is 18872238923. The next prime is 18872238929. The reversal of 18872238924 is 42983227881.

It is a super-2 number, since 2×18872238924² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18872238923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 353284 + ... + 403179.

Almost surely, 2^18872238924 is an apocalyptic number.

18872238924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18872238924 is an abundant number, since it is smaller than the sum of its proper divisors (42637361844).

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

18872238924 is a wasteful number, since it uses less digits than its factorization.

18872238924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756497 (or 756486 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 18872238924 in words is "eighteen billion, eight hundred seventy-two million, two hundred thirty-eight thousand, nine hundred twenty-four".