18304007 has 4 divisors (see below), whose sum is σ = 18509760. Its totient is φ = 18098256.

The previous prime is 18303979. The next prime is 18304031. The reversal of 18304007 is 70040381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18304007 - 2¹⁴ = 18287623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18304037) 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, 102743 + ... + 102920.

It is an arithmetic number, because the mean of its divisors is an integer number (4627440).

Almost surely, 2^18304007 is an apocalyptic number.

18304007 is a deficient number, since it is larger than the sum of its proper divisors (205753).

18304007 is an equidigital number, since it uses as much as digits as its factorization.

18304007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205752.

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

The square root of 18304007 is about 4278.3182443572. The cubic root of 18304007 is about 263.5413245765.

Adding to 18304007 its reverse (70040381), we get a palindrome (88344388).

The spelling of 18304007 in words is "eighteen million, three hundred four thousand, seven".