18045773 has 2 divisors, whose sum is σ = 18045774. Its totient is φ = 18045772.

The previous prime is 18045739. The next prime is 18045787. The reversal of 18045773 is 37754081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16957924 + 1087849 = 4118^2 + 1043^2 .

It is a cyclic number.

It is not a de Polignac number, because 18045773 - 2²² = 13851469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18045173) 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, 9022886 + 9022887.

It is an arithmetic number, because the mean of its divisors is an integer number (9022887).

Almost surely, 2^18045773 is an apocalyptic number.

It is an amenable number.

18045773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18045773 is an equidigital number, since it uses as much as digits as its factorization.

18045773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 18045773 is about 4248.0316618406. The cubic root of 18045773 is about 262.2960980432.

The spelling of 18045773 in words is "eighteen million, forty-five thousand, seven hundred seventy-three".