12323432320 has 128 divisors (see below), whose sum is σ = 30308100480. Its totient is φ = 4788633600.

The previous prime is 12323432309. The next prime is 12323432321. The reversal of 12323432320 is 2323432321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323432321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7110174 + ... + 7111906.

It is an arithmetic number, because the mean of its divisors is an integer number (236782035).

Almost surely, 2^12323432320 is an apocalyptic number.

12323432320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12323432320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15154050240).

12323432320 is an abundant number, since it is smaller than the sum of its proper divisors (17984668160).

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

12323432320 is a wasteful number, since it uses less digits than its factorization.

12323432320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064 (or 2052 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 12323432320 its reverse (2323432321), we get a palindrome (14646864641).

Subtracting from 12323432320 its reverse (2323432321), we obtain a palindrome (9999999999).

The spelling of 12323432320 in words is "twelve billion, three hundred twenty-three million, four hundred thirty-two thousand, three hundred twenty".