18528449 has 2 divisors, whose sum is σ = 18528450. Its totient is φ = 18528448.

The previous prime is 18528431. The next prime is 18528457. The reversal of 18528449 is 94482581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9486400 + 9042049 = 3080^2 + 3007^2 .

It is an emirp because it is prime and its reverse (94482581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18528449 - 2¹² = 18524353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18528479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9264224 + 9264225.

It is an arithmetic number, because the mean of its divisors is an integer number (9264225).

Almost surely, 2^18528449 is an apocalyptic number.

It is an amenable number.

18528449 is a deficient number, since it is larger than the sum of its proper divisors (1).

18528449 is an equidigital number, since it uses as much as digits as its factorization.

18528449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 41.

The square root of 18528449 is about 4304.4684921602. The cubic root of 18528449 is about 264.6141245143.

It can be divided in two parts, 1852 and 8449, that added together give a palindrome (10301).

The spelling of 18528449 in words is "eighteen million, five hundred twenty-eight thousand, four hundred forty-nine".