18007984 has 10 divisors (see below), whose sum is σ = 34890500. Its totient is φ = 9003984.

The previous prime is 18007973. The next prime is 18008017. The reversal of 18007984 is 48970081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562734 + ... + 562765.

It is an arithmetic number, because the mean of its divisors is an integer number (3489050).

Almost surely, 2^18007984 is an apocalyptic number.

It is an amenable number.

18007984 is a deficient number, since it is larger than the sum of its proper divisors (16882516).

18007984 is a wasteful number, since it uses less digits than its factorization.

18007984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125507 (or 1125501 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 18007984 is about 4243.5815062280. The cubic root of 18007984 is about 262.1128818402.

The spelling of 18007984 in words is "eighteen million, seven thousand, nine hundred eighty-four".