18232573 has 2 divisors, whose sum is σ = 18232574. Its totient is φ = 18232572.

The previous prime is 18232549. The next prime is 18232589. The reversal of 18232573 is 37523281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12766329 + 5466244 = 3573^2 + 2338^2 .

It is a cyclic number.

It is not a de Polignac number, because 18232573 - 2⁵ = 18232541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18232523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9116286 + 9116287.

It is an arithmetic number, because the mean of its divisors is an integer number (9116287).

Almost surely, 2^18232573 is an apocalyptic number.

It is an amenable number.

18232573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18232573 is an equidigital number, since it uses as much as digits as its factorization.

18232573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 18232573 is about 4269.9617094302. The cubic root of 18232573 is about 263.1980417395.

The spelling of 18232573 in words is "eighteen million, two hundred thirty-two thousand, five hundred seventy-three".