22991827949 has 2 divisors, whose sum is σ = 22991827950. Its totient is φ = 22991827948.

The previous prime is 22991827919. The next prime is 22991827981. The reversal of 22991827949 is 94972819922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20993112100 + 1998715849 = 144890^2 + 44707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22991827949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22991827891 and 22991827900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22991827919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11495913974 + 11495913975.

It is an arithmetic number, because the mean of its divisors is an integer number (11495913975).

Almost surely, 2^22991827949 is an apocalyptic number.

It is an amenable number.

22991827949 is a deficient number, since it is larger than the sum of its proper divisors (1).

22991827949 is an equidigital number, since it uses as much as digits as its factorization.

22991827949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 62.

The spelling of 22991827949 in words is "twenty-two billion, nine hundred ninety-one million, eight hundred twenty-seven thousand, nine hundred forty-nine".