18512442432 has 280 divisors, whose sum is σ = 60382720992. Its totient is φ = 5607740160.

The previous prime is 18512442427. The next prime is 18512442457. The reversal of 18512442432 is 23424421581.

18512442432 is a `hidden beast` number, since 1 + 85 + 124 + 424 + 32 = 666.

It is a super-2 number, since 2×18512442432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6898563 + ... + 6901245.

Almost surely, 2^18512442432 is an apocalyptic number.

18512442432 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 18512442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30191360496).

18512442432 is an abundant number, since it is smaller than the sum of its proper divisors (41870278560).

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

18512442432 is an equidigital number, since it uses as much as digits as its factorization.

18512442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740 (or 2699 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The spelling of 18512442432 in words is "eighteen billion, five hundred twelve million, four hundred forty-two thousand, four hundred thirty-two".