23965115309 has 4 divisors (see below), whose sum is σ = 24522443616. Its totient is φ = 23407787004.

The previous prime is 23965115281. The next prime is 23965115333. The reversal of 23965115309 is 90351156932.

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 a de Polignac number, because none of the positive numbers 2^k-23965115309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23965115309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23965115809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278664089 + ... + 278664174.

It is an arithmetic number, because the mean of its divisors is an integer number (6130610904).

Almost surely, 2^23965115309 is an apocalyptic number.

It is an amenable number.

23965115309 is a deficient number, since it is larger than the sum of its proper divisors (557328307).

23965115309 is an equidigital number, since it uses as much as digits as its factorization.

23965115309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557328306.

The product of its (nonzero) digits is 218700, while the sum is 44.

The spelling of 23965115309 in words is "twenty-three billion, nine hundred sixty-five million, one hundred fifteen thousand, three hundred nine".