18009304 has 8 divisors (see below), whose sum is σ = 33767460. Its totient is φ = 9004648.

The previous prime is 18009289. The next prime is 18009323. The reversal of 18009304 is 40390081.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1125574 + ... + 1125589.

Almost surely, 2^18009304 is an apocalyptic number.

It is an amenable number.

18009304 is a deficient number, since it is larger than the sum of its proper divisors (15758156).

18009304 is a wasteful number, since it uses less digits than its factorization.

18009304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251169 (or 2251165 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 18009304 is about 4243.7370323808. The cubic root of 18009304 is about 262.1192860468.

Adding to 18009304 its reverse (40390081), we get a palindrome (58399385).

The spelling of 18009304 in words is "eighteen million, nine thousand, three hundred four".