12320321020 has 48 divisors (see below), whose sum is σ = 29646102528. Its totient is φ = 4213062720.

The previous prime is 12320321003. The next prime is 12320321021. The reversal of 12320321020 is 2012302321.

It is a junction number, because it is equal to n+sod(n) for n = 12320320985 and 12320321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320321021) 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, 61266 + ... + 168505.

It is an arithmetic number, because the mean of its divisors is an integer number (617627136).

Almost surely, 2^12320321020 is an apocalyptic number.

12320321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12320321020 is an abundant number, since it is smaller than the sum of its proper divisors (17325781508).

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

12320321020 is a wasteful number, since it uses less digits than its factorization.

12320321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230170 (or 230168 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12320321020 its reverse (2012302321), we get a palindrome (14332623341).

The spelling of 12320321020 in words is "twelve billion, three hundred twenty million, three hundred twenty-one thousand, twenty".