20589090021 has 48 divisors (see below), whose sum is σ = 31817989632. Its totient is φ = 12798324000.

The previous prime is 20589090019. The next prime is 20589090043. The reversal of 20589090021 is 12009098502.

It is not a de Polignac number, because 20589090021 - 2¹ = 20589090019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20589090001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5080446 + ... + 5084496.

It is an arithmetic number, because the mean of its divisors is an integer number (662874784).

Almost surely, 2^20589090021 is an apocalyptic number.

It is an amenable number.

20589090021 is a deficient number, since it is larger than the sum of its proper divisors (11228899611).

20589090021 is a wasteful number, since it uses less digits than its factorization.

20589090021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4694 (or 4691 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 20589090021 in words is "twenty billion, five hundred eighty-nine million, ninety thousand, twenty-one".