23459686021 has 2 divisors, whose sum is σ = 23459686022. Its totient is φ = 23459686020.

The previous prime is 23459686013. The next prime is 23459686031. The reversal of 23459686021 is 12068695432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18437837796 + 5021848225 = 135786^2 + 70865^2 .

It is a cyclic number.

It is not a de Polignac number, because 23459686021 - 2³ = 23459686013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23459686031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11729843010 + 11729843011.

It is an arithmetic number, because the mean of its divisors is an integer number (11729843011).

Almost surely, 2^23459686021 is an apocalyptic number.

It is an amenable number.

23459686021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23459686021 is an equidigital number, since it uses as much as digits as its factorization.

23459686021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 23459686021 in words is "twenty-three billion, four hundred fifty-nine million, six hundred eighty-six thousand, twenty-one".