12320400020 has 48 divisors (see below), whose sum is σ = 26782237440. Its totient is φ = 4755160704.

The previous prime is 12320400007. The next prime is 12320400047. The reversal of 12320400020 is 2000402321.

12320400020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12320399968 and 12320400004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030517 + ... + 1042403.

It is an arithmetic number, because the mean of its divisors is an integer number (557963280).

Almost surely, 2^12320400020 is an apocalyptic number.

12320400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12320400020 is an abundant number, since it is smaller than the sum of its proper divisors (14461837420).

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

12320400020 is a wasteful number, since it uses less digits than its factorization.

12320400020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13712 (or 13710 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 12320400020 its reverse (2000402321), we get a palindrome (14320802341).

The spelling of 12320400020 in words is "twelve billion, three hundred twenty million, four hundred thousand, twenty".