18065573 has 2 divisors, whose sum is σ = 18065574. Its totient is φ = 18065572.

The previous prime is 18065569. The next prime is 18065587. The reversal of 18065573 is 37556081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14386849 + 3678724 = 3793^2 + 1918^2 .

It is a cyclic number.

It is not a de Polignac number, because 18065573 - 2² = 18065569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18065503) 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 as a sum of consecutive naturals, namely, 9032786 + 9032787.

It is an arithmetic number, because the mean of its divisors is an integer number (9032787).

Almost surely, 2^18065573 is an apocalyptic number.

It is an amenable number.

18065573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18065573 is an equidigital number, since it uses as much as digits as its factorization.

18065573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 18065573 is about 4250.3615140362. The cubic root of 18065573 is about 262.3919942670.

The spelling of 18065573 in words is "eighteen million, sixty-five thousand, five hundred seventy-three".