18085373 has 2 divisors, whose sum is σ = 18085374. Its totient is φ = 18085372.

The previous prime is 18085351. The next prime is 18085381. The reversal of 18085373 is 37358081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 2229049 = 3982^2 + 1493^2 .

It is a cyclic number.

It is not a de Polignac number, because 18085373 - 2⁸ = 18085117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18085073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9042686 + 9042687.

It is an arithmetic number, because the mean of its divisors is an integer number (9042687).

Almost surely, 2^18085373 is an apocalyptic number.

It is an amenable number.

18085373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18085373 is an equidigital number, since it uses as much as digits as its factorization.

18085373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 18085373 is about 4252.6900898137. The cubic root of 18085373 is about 262.4878204477.

The spelling of 18085373 in words is "eighteen million, eighty-five thousand, three hundred seventy-three".