18189304 has 16 divisors (see below), whose sum is σ = 38977200. Its totient is φ = 7795392.

The previous prime is 18189299. The next prime is 18189307. The reversal of 18189304 is 40398181.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18189304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18189307) 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, 162349 + ... + 162460.

It is an arithmetic number, because the mean of its divisors is an integer number (2436075).

Almost surely, 2^18189304 is an apocalyptic number.

18189304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18189304 is an abundant number, since it is smaller than the sum of its proper divisors (20787896).

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

18189304 is a wasteful number, since it uses less digits than its factorization.

18189304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324822 (or 324818 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18189304 is about 4264.8920267693. The cubic root of 18189304 is about 262.9896722320.

The spelling of 18189304 in words is "eighteen million, one hundred eighty-nine thousand, three hundred four".