18025417 has 2 divisors, whose sum is σ = 18025418. Its totient is φ = 18025416.

The previous prime is 18025411. The next prime is 18025429. The reversal of 18025417 is 71452081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15397776 + 2627641 = 3924^2 + 1621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18025417 is a prime.

It is not a weakly prime, because it can be changed into another prime (18025411) 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, 9012708 + 9012709.

It is an arithmetic number, because the mean of its divisors is an integer number (9012709).

Almost surely, 2^18025417 is an apocalyptic number.

It is an amenable number.

18025417 is a deficient number, since it is larger than the sum of its proper divisors (1).

18025417 is an equidigital number, since it uses as much as digits as its factorization.

18025417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18025417 is about 4245.6350526158. The cubic root of 18025417 is about 262.1974358201.

Adding to 18025417 its reverse (71452081), we get a palindrome (89477498).

The spelling of 18025417 in words is "eighteen million, twenty-five thousand, four hundred seventeen".