23265185209 has 4 divisors (see below), whose sum is σ = 26588783104. Its totient is φ = 19941587316.

The previous prime is 23265185149. The next prime is 23265185233. The reversal of 23265185209 is 90258156232.

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 not a de Polignac number, because 23265185209 - 2⁷ = 23265185081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23265185309) 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, 1661798937 + ... + 1661798950.

It is an arithmetic number, because the mean of its divisors is an integer number (6647195776).

Almost surely, 2^23265185209 is an apocalyptic number.

It is an amenable number.

23265185209 is a deficient number, since it is larger than the sum of its proper divisors (3323597895).

23265185209 is an equidigital number, since it uses as much as digits as its factorization.

23265185209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323597894.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 23265185209 in words is "twenty-three billion, two hundred sixty-five million, one hundred eighty-five thousand, two hundred nine".