22913092721 has 2 divisors, whose sum is σ = 22913092722. Its totient is φ = 22913092720.

The previous prime is 22913092691. The next prime is 22913092777. The reversal of 22913092721 is 12729031922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21833313121 + 1079779600 = 147761^2 + 32860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22913092721 is a prime.

It is a super-2 number, since 2×22913092721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22913092021) by changing a digit.

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 as a sum of consecutive naturals, namely, 11456546360 + 11456546361.

It is an arithmetic number, because the mean of its divisors is an integer number (11456546361).

Almost surely, 2^22913092721 is an apocalyptic number.

It is an amenable number.

22913092721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22913092721 is an equidigital number, since it uses as much as digits as its factorization.

22913092721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 22913092721 in words is "twenty-two billion, nine hundred thirteen million, ninety-two thousand, seven hundred twenty-one".