20008589 has 2 divisors, whose sum is σ = 20008590. Its totient is φ = 20008588.

The previous prime is 20008559. The next prime is 20008603. The reversal of 20008589 is 98580002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18852964 + 1155625 = 4342^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 20008589 - 2⁸ = 20008333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20008529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004294 + 10004295.

It is an arithmetic number, because the mean of its divisors is an integer number (10004295).

Almost surely, 2^20008589 is an apocalyptic number.

It is an amenable number.

20008589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20008589 is an equidigital number, since it uses as much as digits as its factorization.

20008589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 20008589 is about 4473.0961313167. The cubic root of 20008589 is about 271.4806129866.

The spelling of 20008589 in words is "twenty million, eight thousand, five hundred eighty-nine".