23851068513 has 4 divisors (see below), whose sum is σ = 31801424688. Its totient is φ = 15900712340.

The previous prime is 23851068509. The next prime is 23851068557. The reversal of 23851068513 is 31586015832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23851068513 - 2² = 23851068509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23851068583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3975178083 + ... + 3975178088.

It is an arithmetic number, because the mean of its divisors is an integer number (7950356172).

Almost surely, 2^23851068513 is an apocalyptic number.

It is an amenable number.

23851068513 is a deficient number, since it is larger than the sum of its proper divisors (7950356175).

23851068513 is an equidigital number, since it uses as much as digits as its factorization.

23851068513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950356174.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 23851068513 in words is "twenty-three billion, eight hundred fifty-one million, sixty-eight thousand, five hundred thirteen".