20973922265 has 4 divisors (see below), whose sum is σ = 25168706724. Its totient is φ = 16779137808.

The previous prime is 20973922181. The next prime is 20973922303. The reversal of 20973922265 is 56222937902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16742289664 + 4231632601 = 129392^2 + 65051^2 .

It is a cyclic number.

It is not a de Polignac number, because 20973922265 - 2²⁴ = 20957145049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2097392222 + ... + 2097392231.

It is an arithmetic number, because the mean of its divisors is an integer number (6292176681).

Almost surely, 2^20973922265 is an apocalyptic number.

It is an amenable number.

20973922265 is a deficient number, since it is larger than the sum of its proper divisors (4194784459).

20973922265 is an equidigital number, since it uses as much as digits as its factorization.

20973922265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194784458.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 20973922265 in words is "twenty billion, nine hundred seventy-three million, nine hundred twenty-two thousand, two hundred sixty-five".