18087516432 has 140 divisors (see below), whose sum is σ = 54238822144. Its totient is φ = 5834566080.

The previous prime is 18087516409. The next prime is 18087516439. The reversal of 18087516432 is 23461578081.

18087516432 is a `hidden beast` number, since 18 + 0 + 87 + 516 + 43 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (18087516439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 336573 + ... + 386595.

Almost surely, 2^18087516432 is an apocalyptic number.

18087516432 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 18087516432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27119411072).

18087516432 is an abundant number, since it is smaller than the sum of its proper divisors (36151305712).

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

18087516432 is an equidigital number, since it uses as much as digits as its factorization.

18087516432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50080 (or 50059 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 18087516432 in words is "eighteen billion, eighty-seven million, five hundred sixteen thousand, four hundred thirty-two".