18004529 has 2 divisors, whose sum is σ = 18004530. Its totient is φ = 18004528.

The previous prime is 18004507. The next prime is 18004537. The reversal of 18004529 is 92540081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17098225 + 906304 = 4135^2 + 952^2 .

It is an emirp because it is prime and its reverse (92540081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18004529 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18004579) 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, 9002264 + 9002265.

It is an arithmetic number, because the mean of its divisors is an integer number (9002265).

Almost surely, 2^18004529 is an apocalyptic number.

It is an amenable number.

18004529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18004529 is an equidigital number, since it uses as much as digits as its factorization.

18004529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18004529 is about 4243.1744013180. The cubic root of 18004529 is about 262.0961178328.

The spelling of 18004529 in words is "eighteen million, four thousand, five hundred twenty-nine".