18028529 has 2 divisors, whose sum is σ = 18028530. Its totient is φ = 18028528.

The previous prime is 18028523. The next prime is 18028541. The reversal of 18028529 is 92582081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 1827904 = 4025^2 + 1352^2 .

It is an emirp because it is prime and its reverse (92582081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18028529 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 (18028523) 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, 9014264 + 9014265.

It is an arithmetic number, because the mean of its divisors is an integer number (9014265).

Almost surely, 2^18028529 is an apocalyptic number.

It is an amenable number.

18028529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18028529 is an equidigital number, since it uses as much as digits as its factorization.

18028529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18028529 is about 4246.0015308523. The cubic root of 18028529 is about 262.2125239864.

The spelling of 18028529 in words is "eighteen million, twenty-eight thousand, five hundred twenty-nine".