20973922267 has 4 divisors (see below), whose sum is σ = 20974459240. Its totient is φ = 20973385296.

The previous prime is 20973922181. The next prime is 20973922303. The reversal of 20973922267 is 76222937902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76222937902 = 2 ⋅38111468951.

It is a cyclic number.

It is not a de Polignac number, because 20973922267 - 2²⁷ = 20839704539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20973922267.

It is not an unprimeable number, because it can be changed into a prime (20973929267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204873 + ... + 289690.

It is an arithmetic number, because the mean of its divisors is an integer number (5243614810).

Almost surely, 2^20973922267 is an apocalyptic number.

20973922267 is a deficient number, since it is larger than the sum of its proper divisors (536973).

20973922267 is an equidigital number, since it uses as much as digits as its factorization.

20973922267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536972.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 20973922267 in words is "twenty billion, nine hundred seventy-three million, nine hundred twenty-two thousand, two hundred sixty-seven".