23281372817 has 2 divisors, whose sum is σ = 23281372818. Its totient is φ = 23281372816.

The previous prime is 23281372799. The next prime is 23281372819. The reversal of 23281372817 is 71827318232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20114046976 + 3167325841 = 141824^2 + 56279^2 .

It is a cyclic number.

It is not a de Polignac number, because 23281372817 - 2²⁰ = 23280324241 is a prime.

Together with 23281372819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23281372819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11640686408 + 11640686409.

It is an arithmetic number, because the mean of its divisors is an integer number (11640686409).

Almost surely, 2^23281372817 is an apocalyptic number.

It is an amenable number.

23281372817 is a deficient number, since it is larger than the sum of its proper divisors (1).

23281372817 is an equidigital number, since it uses as much as digits as its factorization.

23281372817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The spelling of 23281372817 in words is "twenty-three billion, two hundred eighty-one million, three hundred seventy-two thousand, eight hundred seventeen".