20589986509 has 8 divisors (see below), whose sum is σ = 21803402880. Its totient is φ = 19376819136.

The previous prime is 20589986489. The next prime is 20589986533. The reversal of 20589986509 is 90568998502.

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 20589986509 - 2²⁹ = 20053115597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20589986579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123942 + ... + 237784.

It is an arithmetic number, because the mean of its divisors is an integer number (2725425360).

Almost surely, 2^20589986509 is an apocalyptic number.

It is an amenable number.

20589986509 is a deficient number, since it is larger than the sum of its proper divisors (1213416371).

20589986509 is a wasteful number, since it uses less digits than its factorization.

20589986509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124499.

The product of its (nonzero) digits is 13996800, while the sum is 61.

The spelling of 20589986509 in words is "twenty billion, five hundred eighty-nine million, nine hundred eighty-six thousand, five hundred nine".