18324007728 has 40 divisors (see below), whose sum is σ = 50978330928. Its totient is φ = 5638156032.

The previous prime is 18324007717. The next prime is 18324007733. The reversal of 18324007728 is 82770042381.

It is a self number, because there is not a number n which added to its sum of digits gives 18324007728.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14682075 + ... + 14683322.

Almost surely, 2^18324007728 is an apocalyptic number.

It is an amenable number.

18324007728 is an abundant number, since it is smaller than the sum of its proper divisors (32654323200).

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

18324007728 is a wasteful number, since it uses less digits than its factorization.

18324007728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29365421 (or 29365415 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 18324007728 in words is "eighteen billion, three hundred twenty-four million, seven thousand, seven hundred twenty-eight".