18109304 has 16 divisors (see below), whose sum is σ = 34084320. Its totient is φ = 9020160.

The previous prime is 18109297. The next prime is 18109307. The reversal of 18109304 is 40390181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18109307) 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 3 ways as a sum of consecutive naturals, for example, 2009 + ... + 6344.

It is an arithmetic number, because the mean of its divisors is an integer number (2130270).

Almost surely, 2^18109304 is an apocalyptic number.

It is an amenable number.

18109304 is a deficient number, since it is larger than the sum of its proper divisors (15975016).

18109304 is a wasteful number, since it uses less digits than its factorization.

18109304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8630 (or 8626 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18109304 is about 4255.5027905055. The cubic root of 18109304 is about 262.6035461489.

Adding to 18109304 its reverse (40390181), we get a palindrome (58499485).

The spelling of 18109304 in words is "eighteen million, one hundred nine thousand, three hundred four".