18018884544 has 56 divisors (see below), whose sum is σ = 47694037200. Its totient is φ = 6003892224.

The previous prime is 18018884491. The next prime is 18018884567. The reversal of 18018884544 is 44548881081.

It is a happy number.

It is a congruent number.

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, 499632 + ... + 534480.

Almost surely, 2^18018884544 is an apocalyptic number.

It is an amenable number.

18018884544 is an abundant number, since it is smaller than the sum of its proper divisors (29675152656).

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

18018884544 is a wasteful number, since it uses less digits than its factorization.

18018884544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37557 (or 37547 counting only the distinct ones).

The product of its (nonzero) digits is 1310720, while the sum is 51.

The spelling of 18018884544 in words is "eighteen billion, eighteen million, eight hundred eighty-four thousand, five hundred forty-four".