20165589 has 12 divisors (see below), whose sum is σ = 29283072. Its totient is φ = 13372200.

The previous prime is 20165567. The next prime is 20165609. The reversal of 20165589 is 98556102.

It is a happy number.

It is not a de Polignac number, because 20165589 - 2⁵ = 20165557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4147 + ... + 7584.

It is an arithmetic number, because the mean of its divisors is an integer number (2440256).

Almost surely, 2^20165589 is an apocalyptic number.

It is an amenable number.

20165589 is a deficient number, since it is larger than the sum of its proper divisors (9117483).

20165589 is a wasteful number, since it uses less digits than its factorization.

20165589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11928 (or 11925 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 20165589 is about 4490.6112056156. The cubic root of 20165589 is about 272.1888331548.

The spelling of 20165589 in words is "twenty million, one hundred sixty-five thousand, five hundred eighty-nine".