23311320961 has 2 divisors, whose sum is σ = 23311320962. Its totient is φ = 23311320960.

The previous prime is 23311320911. The next prime is 23311321003. The reversal of 23311320961 is 16902311332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20213730625 + 3097590336 = 142175^2 + 55656^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311320961 - 2¹¹ = 23311318913 is a prime.

It is not a weakly prime, because it can be changed into another prime (23311320911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655660480 + 11655660481.

It is an arithmetic number, because the mean of its divisors is an integer number (11655660481).

Almost surely, 2^23311320961 is an apocalyptic number.

It is an amenable number.

23311320961 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311320961 is an equidigital number, since it uses as much as digits as its factorization.

23311320961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 23311320961 in words is "twenty-three billion, three hundred eleven million, three hundred twenty thousand, nine hundred sixty-one".