21772207267 has 2 divisors, whose sum is σ = 21772207268. Its totient is φ = 21772207266.

The previous prime is 21772207229. The next prime is 21772207321. The reversal of 21772207267 is 76270227712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21772207267 - 2²⁷ = 21637989539 is a prime.

It is not a weakly prime, because it can be changed into another prime (21772807267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10886103633 + 10886103634.

It is an arithmetic number, because the mean of its divisors is an integer number (10886103634).

Almost surely, 2^21772207267 is an apocalyptic number.

21772207267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21772207267 is an equidigital number, since it uses as much as digits as its factorization.

21772207267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230496, while the sum is 43.

The spelling of 21772207267 in words is "twenty-one billion, seven hundred seventy-two million, two hundred seven thousand, two hundred sixty-seven".