18448589 has 2 divisors, whose sum is σ = 18448590. Its totient is φ = 18448588.

The previous prime is 18448579. The next prime is 18448609. The reversal of 18448589 is 98584481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 4884100 = 3683^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 18448589 - 2²⁰ = 17400013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18448579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9224294 + 9224295.

It is an arithmetic number, because the mean of its divisors is an integer number (9224295).

Almost surely, 2^18448589 is an apocalyptic number.

It is an amenable number.

18448589 is a deficient number, since it is larger than the sum of its proper divisors (1).

18448589 is an equidigital number, since it uses as much as digits as its factorization.

18448589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 47.

The square root of 18448589 is about 4295.1820683179. The cubic root of 18448589 is about 264.2334033584.

The spelling of 18448589 in words is "eighteen million, four hundred forty-eight thousand, five hundred eighty-nine".