18025789 has 2 divisors, whose sum is σ = 18025790. Its totient is φ = 18025788.

The previous prime is 18025783. The next prime is 18025823. The reversal of 18025789 is 98752081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11108889 + 6916900 = 3333^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 18025789 - 2³ = 18025781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18025781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9012894 + 9012895.

It is an arithmetic number, because the mean of its divisors is an integer number (9012895).

Almost surely, 2^18025789 is an apocalyptic number.

It is an amenable number.

18025789 is a deficient number, since it is larger than the sum of its proper divisors (1).

18025789 is an equidigital number, since it uses as much as digits as its factorization.

18025789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 18025789 is about 4245.6788620903. The cubic root of 18025789 is about 262.1992395098.

The spelling of 18025789 in words is "eighteen million, twenty-five thousand, seven hundred eighty-nine".