18642588912 has 80 divisors (see below), whose sum is σ = 55837735680. Its totient is φ = 5944010688.

The previous prime is 18642588857. The next prime is 18642588971. The reversal of 18642588912 is 21988524681.

18642588912 is a `hidden beast` number, since 1 + 8 + 6 + 42 + 588 + 9 + 12 = 666.

It is a super-2 number, since 2×18642588912² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928198 + ... + 948069.

It is an arithmetic number, because the mean of its divisors is an integer number (697971696).

Almost surely, 2^18642588912 is an apocalyptic number.

18642588912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18642588912 is an abundant number, since it is smaller than the sum of its proper divisors (37195146768).

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

18642588912 is a wasteful number, since it uses less digits than its factorization.

18642588912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876307 (or 1876295 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The spelling of 18642588912 in words is "eighteen billion, six hundred forty-two million, five hundred eighty-eight thousand, nine hundred twelve".