21772054963 has 2 divisors, whose sum is σ = 21772054964. Its totient is φ = 21772054962.

The previous prime is 21772054961. The next prime is 21772054999. The reversal of 21772054963 is 36945027712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21772054963 - 2¹ = 21772054961 is a prime.

Together with 21772054961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21772054961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10886027481 + 10886027482.

It is an arithmetic number, because the mean of its divisors is an integer number (10886027482).

Almost surely, 2^21772054963 is an apocalyptic number.

21772054963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21772054963 is an equidigital number, since it uses as much as digits as its factorization.

21772054963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 21772054963 in words is "twenty-one billion, seven hundred seventy-two million, fifty-four thousand, nine hundred sixty-three".