18604373 has 2 divisors, whose sum is σ = 18604374. Its totient is φ = 18604372.

The previous prime is 18604361. The next prime is 18604387. The reversal of 18604373 is 37340681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14691889 + 3912484 = 3833^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 18604373 - 2²² = 14410069 is a prime.

It is a super-2 number, since 2×18604373² = 692245389446258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18604393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9302186 + 9302187.

It is an arithmetic number, because the mean of its divisors is an integer number (9302187).

Almost surely, 2^18604373 is an apocalyptic number.

It is an amenable number.

18604373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18604373 is an equidigital number, since it uses as much as digits as its factorization.

18604373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 18604373 is about 4313.2786833220. The cubic root of 18604373 is about 264.9750682608.

The spelling of 18604373 in words is "eighteen million, six hundred four thousand, three hundred seventy-three".