18001204 has 36 divisors (see below), whose sum is σ = 35253120. Its totient is φ = 8030880.

The previous prime is 18001201. The next prime is 18001213. The reversal of 18001204 is 40210081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18001201) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 20527 + ... + 21385.

Almost surely, 2^18001204 is an apocalyptic number.

It is an amenable number.

18001204 is a deficient number, since it is larger than the sum of its proper divisors (17251916).

18001204 is a wasteful number, since it uses less digits than its factorization.

18001204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 18001204 is about 4242.7825775074. The cubic root of 18001204 is about 262.0799825733.

Adding to 18001204 its reverse (40210081), we get a palindrome (58211285).

The spelling of 18001204 in words is "eighteen million, one thousand, two hundred four".