18008204 has 6 divisors (see below), whose sum is σ = 31514364. Its totient is φ = 9004100.

The previous prime is 18008197. The next prime is 18008209. The reversal of 18008204 is 40280081.

It is a super-2 number, since 2×18008204² = 648590822611232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18008204.

It is not an unprimeable number, because it can be changed into a prime (18008209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2251022 + ... + 2251029.

It is an arithmetic number, because the mean of its divisors is an integer number (5252394).

Almost surely, 2^18008204 is an apocalyptic number.

It is an amenable number.

18008204 is a deficient number, since it is larger than the sum of its proper divisors (13506160).

18008204 is a wasteful number, since it uses less digits than its factorization.

18008204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502055 (or 4502053 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 18008204 is about 4243.6074276493. The cubic root of 18008204 is about 262.1139492297.

Adding to 18008204 its reverse (40280081), we get a palindrome (58288285).

The spelling of 18008204 in words is "eighteen million, eight thousand, two hundred four".