18018027984 has 40 divisors (see below), whose sum is σ = 50778080352. Its totient is φ = 5460008320.

The previous prime is 18018027971. The next prime is 18018027991. The reversal of 18018027984 is 48972081081.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 17061999 + ... + 17063054.

Almost surely, 2^18018027984 is an apocalyptic number.

It is an amenable number.

18018027984 is an abundant number, since it is smaller than the sum of its proper divisors (32760052368).

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

18018027984 is a wasteful number, since it uses less digits than its factorization.

18018027984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34125075 (or 34125069 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 18018027984 in words is "eighteen billion, eighteen million, twenty-seven thousand, nine hundred eighty-four".