18238804 has 12 divisors (see below), whose sum is σ = 32010804. Its totient is φ = 9092864.

The previous prime is 18238789. The next prime is 18238811. The reversal of 18238804 is 40883281.

It can be written as a sum of positive squares in 2 ways, for example, as 8690704 + 9548100 = 2948^2 + 3090^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18238804.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 5047 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (2667567).

Almost surely, 2^18238804 is an apocalyptic number.

It is an amenable number.

18238804 is a deficient number, since it is larger than the sum of its proper divisors (13772000).

18238804 is a wasteful number, since it uses less digits than its factorization.

18238804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13274 (or 13272 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 18238804 is about 4270.6912789383. The cubic root of 18238804 is about 263.2280210556.

The spelling of 18238804 in words is "eighteen million, two hundred thirty-eight thousand, eight hundred four".