20328589 has 2 divisors, whose sum is σ = 20328590. Its totient is φ = 20328588.

The previous prime is 20328569. The next prime is 20328629. The reversal of 20328589 is 98582302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 3861225 = 4058^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 20328589 - 2⁵ = 20328557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20328569) 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, 10164294 + 10164295.

It is an arithmetic number, because the mean of its divisors is an integer number (10164295).

Almost surely, 2^20328589 is an apocalyptic number.

It is an amenable number.

20328589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20328589 is an equidigital number, since it uses as much as digits as its factorization.

20328589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 20328589 is about 4508.7236553153. The cubic root of 20328589 is about 272.9202404002.

The spelling of 20328589 in words is "twenty million, three hundred twenty-eight thousand, five hundred eighty-nine".