23126621342017 has 2 divisors, whose sum is σ = 23126621342018. Its totient is φ = 23126621342016.

The previous prime is 23126621341979. The next prime is 23126621342039. The reversal of 23126621342017 is 71024312662132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23081865400881 + 44755941136 = 4804359^2 + 211556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23126621342017 is a prime.

It is a super-2 number, since 2×23126621342017² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23126621342317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11563310671008 + 11563310671009.

It is an arithmetic number, because the mean of its divisors is an integer number (11563310671009).

Almost surely, 2^{23126621342017} is an apocalyptic number.

It is an amenable number.

23126621342017 is a deficient number, since it is larger than the sum of its proper divisors (1).

23126621342017 is an equidigital number, since it uses as much as digits as its factorization.

23126621342017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 23126621342017 in words is "twenty-three trillion, one hundred twenty-six billion, six hundred twenty-one million, three hundred forty-two thousand, seventeen".