18023984 has 20 divisors (see below), whose sum is σ = 38096520. Its totient is φ = 8192640.

The previous prime is 18023981. The next prime is 18024011. The reversal of 18023984 is 48932081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18023981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51029 + ... + 51380.

It is an arithmetic number, because the mean of its divisors is an integer number (1904826).

Almost surely, 2^18023984 is an apocalyptic number.

It is an amenable number.

18023984 is an abundant number, since it is smaller than the sum of its proper divisors (20072536).

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

18023984 is a wasteful number, since it uses less digits than its factorization.

18023984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102428 (or 102422 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18023984 is about 4245.4662877003. The cubic root of 18023984 is about 262.1904875041.

The spelling of 18023984 in words is "eighteen million, twenty-three thousand, nine hundred eighty-four".