18713257632 has 120 divisors (see below), whose sum is σ = 56810742912. Its totient is φ = 6036508800.

The previous prime is 18713257583. The next prime is 18713257657. The reversal of 18713257632 is 23675231781.

18713257632 is a `hidden beast` number, since 1 + 8 + 7 + 1 + 3 + 2 + 5 + 7 + 632 = 666.

It is a super-2 number, since 2×18713257632² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36094 + ... + 196797.

Almost surely, 2^18713257632 is an apocalyptic number.

18713257632 is a gapful number since it is divisible by the number (12) 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 18713257632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28405371456).

18713257632 is an abundant number, since it is smaller than the sum of its proper divisors (38097485280).

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

18713257632 is a wasteful number, since it uses less digits than its factorization.

18713257632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232944 (or 232927 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 18713257632 in words is "eighteen billion, seven hundred thirteen million, two hundred fifty-seven thousand, six hundred thirty-two".