18256529032 has 32 divisors (see below), whose sum is σ = 39406705920. Its totient is φ = 7767112320.

The previous prime is 18256529009. The next prime is 18256529033. The reversal of 18256529032 is 23092565281.

It is a self number, because there is not a number n which added to its sum of digits gives 18256529032.

It is not an unprimeable number, because it can be changed into a prime (18256529033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182144 + ... + 1197487.

It is an arithmetic number, because the mean of its divisors is an integer number (1231459560).

Almost surely, 2^18256529032 is an apocalyptic number.

It is an amenable number.

18256529032 is an abundant number, since it is smaller than the sum of its proper divisors (21150176888).

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

18256529032 is a wasteful number, since it uses less digits than its factorization.

18256529032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379781 (or 2379777 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 18256529032 in words is "eighteen billion, two hundred fifty-six million, five hundred twenty-nine thousand, thirty-two".