18328984 has 16 divisors (see below), whose sum is σ = 34596720. Its totient is φ = 9103200.

The previous prime is 18328979. The next prime is 18328987. The reversal of 18328984 is 48982381.

It is a self number, because there is not a number n which added to its sum of digits gives 18328984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6379 + ... + 8794.

It is an arithmetic number, because the mean of its divisors is an integer number (2162295).

Almost surely, 2^18328984 is an apocalyptic number.

It is an amenable number.

18328984 is a deficient number, since it is larger than the sum of its proper divisors (16267736).

18328984 is a wasteful number, since it uses less digits than its factorization.

18328984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15330 (or 15326 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 18328984 is about 4281.2362700510. The cubic root of 18328984 is about 263.6611431470.

It can be divided in two parts, 1832 and 8984, that added together give a square (10816 = 104²).

The spelling of 18328984 in words is "eighteen million, three hundred twenty-eight thousand, nine hundred eighty-four".