18000804 has 24 divisors (see below), whose sum is σ = 43027488. Its totient is φ = 5853760.

The previous prime is 18000803. The next prime is 18000811. The reversal of 18000804 is 40800081.

It is not an unprimeable number, because it can be changed into a prime (18000803) 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 7 ways as a sum of consecutive naturals, for example, 17802 + ... + 18785.

It is an arithmetic number, because the mean of its divisors is an integer number (1792812).

Almost surely, 2^18000804 is an apocalyptic number.

It is an amenable number.

18000804 is an abundant number, since it is smaller than the sum of its proper divisors (25026684).

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

18000804 is a wasteful number, since it uses less digits than its factorization.

18000804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36635 (or 36633 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 18000804 is about 4242.7354383699. The cubic root of 18000804 is about 262.0780413555.

Adding to 18000804 its reverse (40800081), we get a palindrome (58800885).

The spelling of 18000804 in words is "eighteen million, eight hundred four", and thus it is an aban number.