23401647909917 has 2 divisors, whose sum is σ = 23401647909918. Its totient is φ = 23401647909916.

The previous prime is 23401647909859. The next prime is 23401647909929. The reversal of 23401647909917 is 71990974610432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13404282926596 + 9997364983321 = 3661186^2 + 3161861^2 .

It is a cyclic number.

It is not a de Polignac number, because 23401647909917 - 2¹⁸ = 23401647647773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23401647909917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23401640909917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11700823954958 + 11700823954959.

It is an arithmetic number, because the mean of its divisors is an integer number (11700823954959).

Almost surely, 2^{23401647909917} is an apocalyptic number.

It is an amenable number.

23401647909917 is a deficient number, since it is larger than the sum of its proper divisors (1).

23401647909917 is an equidigital number, since it uses as much as digits as its factorization.

23401647909917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 23401647909917 in words is "twenty-three trillion, four hundred one billion, six hundred forty-seven million, nine hundred nine thousand, nine hundred seventeen".