20320564205 has 16 divisors (see below), whose sum is σ = 24856326144. Its totient is φ = 15945028800.

The previous prime is 20320564153. The next prime is 20320564211. The reversal of 20320564205 is 50246502302.

It is not a de Polignac number, because 20320564205 - 2²⁴ = 20303786989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133997 + ... + 242066.

It is an arithmetic number, because the mean of its divisors is an integer number (1553520384).

Almost surely, 2^20320564205 is an apocalyptic number.

It is an amenable number.

20320564205 is a deficient number, since it is larger than the sum of its proper divisors (4535761939).

20320564205 is a wasteful number, since it uses less digits than its factorization.

20320564205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376276.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20320564205 in words is "twenty billion, three hundred twenty million, five hundred sixty-four thousand, two hundred five".