23689881517 has 2 divisors, whose sum is σ = 23689881518. Its totient is φ = 23689881516.

The previous prime is 23689881469. The next prime is 23689881521. The reversal of 23689881517 is 71518898632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23077863396 + 612018121 = 151914^2 + 24739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23689881517 is a prime.

It is a super-2 number, since 2×23689881517² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23689881557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11844940758 + 11844940759.

It is an arithmetic number, because the mean of its divisors is an integer number (11844940759).

Almost surely, 2^23689881517 is an apocalyptic number.

It is an amenable number.

23689881517 is a deficient number, since it is larger than the sum of its proper divisors (1).

23689881517 is an equidigital number, since it uses as much as digits as its factorization.

23689881517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 58.

The spelling of 23689881517 in words is "twenty-three billion, six hundred eighty-nine million, eight hundred eighty-one thousand, five hundred seventeen".