20791564307 has 8 divisors (see below), whose sum is σ = 20860864560. Its totient is φ = 20722379040.

The previous prime is 20791564289. The next prime is 20791564319. The reversal of 20791564307 is 70346519702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20791564307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20791563307) 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, 341369 + ... + 397637.

It is an arithmetic number, because the mean of its divisors is an integer number (2607608070).

Almost surely, 2^20791564307 is an apocalyptic number.

20791564307 is a deficient number, since it is larger than the sum of its proper divisors (69300253).

20791564307 is an equidigital number, since it uses as much as digits as its factorization.

20791564307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57493.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 20791564307 in words is "twenty billion, seven hundred ninety-one million, five hundred sixty-four thousand, three hundred seven".