18564529 has 2 divisors, whose sum is σ = 18564530. Its totient is φ = 18564528.

The previous prime is 18564503. The next prime is 18564547. The reversal of 18564529 is 92546581.

18564529 is nontrivially palindromic in base 2.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 74529 = 4300^2 + 273^2 .

It is a cyclic number.

It is not a de Polignac number, because 18564529 - 2⁷ = 18564401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18564491 and 18564500.

It is not a weakly prime, because it can be changed into another prime (18564569) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9282264 + 9282265.

It is an arithmetic number, because the mean of its divisors is an integer number (9282265).

Almost surely, 2^18564529 is an apocalyptic number.

It is an amenable number.

18564529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18564529 is an equidigital number, since it uses as much as digits as its factorization.

18564529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 40.

The square root of 18564529 is about 4308.6574475119. The cubic root of 18564529 is about 264.7857720394.

The spelling of 18564529 in words is "eighteen million, five hundred sixty-four thousand, five hundred twenty-nine".