12323304520 has 32 divisors (see below), whose sum is σ = 27730625400. Its totient is φ = 4928754688.

The previous prime is 12323304509. The next prime is 12323304533. The reversal of 12323304520 is 2540332321.

It can be written as a sum of positive squares in 4 ways, for example, as 10562495076 + 1760809444 = 102774^2 + 41962^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600672 + ... + 620848.

Almost surely, 2^12323304520 is an apocalyptic number.

12323304520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12323304520 is an abundant number, since it is smaller than the sum of its proper divisors (15407320880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12323304520 is a wasteful number, since it uses less digits than its factorization.

12323304520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35457 (or 35453 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 12323304520 its reverse (2540332321), we get a palindrome (14863636841).

The spelling of 12323304520 in words is "twelve billion, three hundred twenty-three million, three hundred four thousand, five hundred twenty".