18013804 has 12 divisors (see below), whose sum is σ = 31585624. Its totient is φ = 8989344.

The previous prime is 18013781. The next prime is 18013813. The reversal of 18013804 is 40831081.

It is an unprimeable number.

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, 1929 + ... + 6304.

Almost surely, 2^18013804 is an apocalyptic number.

It is an amenable number.

18013804 is a deficient number, since it is larger than the sum of its proper divisors (13571820).

18013804 is a wasteful number, since it uses less digits than its factorization.

18013804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8784 (or 8782 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18013804 is about 4244.2671923431. The cubic root of 18013804 is about 262.1411162177.

Adding to 18013804 its reverse (40831081), we get a palindrome (58844885).

The spelling of 18013804 in words is "eighteen million, thirteen thousand, eight hundred four".