20520589 has 8 divisors (see below), whose sum is σ = 22103840. Its totient is φ = 18987696.

The previous prime is 20520571. The next prime is 20520629. The reversal of 20520589 is 98502502.

It is a happy number.

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 20520589 - 2⁵ = 20520557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20520589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520509) 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, 11742 + ... + 13375.

It is an arithmetic number, because the mean of its divisors is an integer number (2762980).

Almost surely, 2^20520589 is an apocalyptic number.

It is an amenable number.

20520589 is a deficient number, since it is larger than the sum of its proper divisors (1583251).

20520589 is a wasteful number, since it uses less digits than its factorization.

20520589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25179.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 20520589 is about 4529.9656731591. The cubic root of 20520589 is about 273.7767775423.

The spelling of 20520589 in words is "twenty million, five hundred twenty thousand, five hundred eighty-nine".