23099552981 has 2 divisors, whose sum is σ = 23099552982. Its totient is φ = 23099552980.

The previous prime is 23099552977. The next prime is 23099553041. The reversal of 23099552981 is 18925599032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18250659025 + 4848893956 = 135095^2 + 69634^2 .

It is a cyclic number.

It is not a de Polignac number, because 23099552981 - 2² = 23099552977 is a prime.

It is a super-2 number, since 2×23099552981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23099552951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11549776490 + 11549776491.

It is an arithmetic number, because the mean of its divisors is an integer number (11549776491).

Almost surely, 2^23099552981 is an apocalyptic number.

It is an amenable number.

23099552981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23099552981 is an equidigital number, since it uses as much as digits as its factorization.

23099552981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 53.

The spelling of 23099552981 in words is "twenty-three billion, ninety-nine million, five hundred fifty-two thousand, nine hundred eighty-one".