18307004 has 24 divisors (see below), whose sum is σ = 33504240. Its totient is φ = 8741376.

The previous prime is 18307001. The next prime is 18307021. The reversal of 18307004 is 40070381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18307001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10439 + ... + 12065.

It is an arithmetic number, because the mean of its divisors is an integer number (1396010).

Almost surely, 2^18307004 is an apocalyptic number.

It is an amenable number.

18307004 is a deficient number, since it is larger than the sum of its proper divisors (15197236).

18307004 is a wasteful number, since it uses less digits than its factorization.

18307004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 18307004 is about 4278.6684844704. The cubic root of 18307004 is about 263.5557074062. Note that the first 3 decimals are identical.

Adding to 18307004 its reverse (40070381), we get a palindrome (58377385).

The spelling of 18307004 in words is "eighteen million, three hundred seven thousand, four".