22947577669721 has 2 divisors, whose sum is σ = 22947577669722. Its totient is φ = 22947577669720.

The previous prime is 22947577669717. The next prime is 22947577669741. The reversal of 22947577669721 is 12796677574922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19091306809600 + 3856270860121 = 4369360^2 + 1963739^2 .

It is a cyclic number.

It is not a de Polignac number, because 22947577669721 - 2² = 22947577669717 is a prime.

It is not a weakly prime, because it can be changed into another prime (22947577669741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11473788834860 + 11473788834861.

It is an arithmetic number, because the mean of its divisors is an integer number (11473788834861).

Almost surely, 2^{22947577669721} is an apocalyptic number.

It is an amenable number.

22947577669721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22947577669721 is an equidigital number, since it uses as much as digits as its factorization.

22947577669721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120210560, while the sum is 74.

The spelling of 22947577669721 in words is "twenty-two trillion, nine hundred forty-seven billion, five hundred seventy-seven million, six hundred sixty-nine thousand, seven hundred twenty-one".