20589689 has 8 divisors (see below), whose sum is σ = 20880288. Its totient is φ = 20301120.

The previous prime is 20589677. The next prime is 20589707. The reversal of 20589689 is 98698502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20589689 - 2²⁰ = 19541113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20589629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35774 + ... + 36344.

It is an arithmetic number, because the mean of its divisors is an integer number (2610036).

Almost surely, 2^20589689 is an apocalyptic number.

It is an amenable number.

20589689 is a deficient number, since it is larger than the sum of its proper divisors (290599).

20589689 is a wasteful number, since it uses less digits than its factorization.

20589689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 20589689 is about 4537.5862526237. The cubic root of 20589689 is about 274.0837339765.

The spelling of 20589689 in words is "twenty million, five hundred eighty-nine thousand, six hundred eighty-nine".