23391159881 has 2 divisors, whose sum is σ = 23391159882. Its totient is φ = 23391159880.

The previous prime is 23391159871. The next prime is 23391159893. The reversal of 23391159881 is 18895119332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23370765625 + 20394256 = 152875^2 + 4516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23391159881 is a prime.

It is a super-2 number, since 2×23391159881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23391159871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11695579940 + 11695579941.

It is an arithmetic number, because the mean of its divisors is an integer number (11695579941).

Almost surely, 2^23391159881 is an apocalyptic number.

It is an amenable number.

23391159881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23391159881 is an equidigital number, since it uses as much as digits as its factorization.

23391159881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The spelling of 23391159881 in words is "twenty-three billion, three hundred ninety-one million, one hundred fifty-nine thousand, eight hundred eighty-one".