12344421320 has 128 divisors (see below), whose sum is σ = 35215948800. Its totient is φ = 3782342400.

The previous prime is 12344421311. The next prime is 12344421377. The reversal of 12344421320 is 2312444321.

It is a self number, because there is not a number n which added to its sum of digits gives 12344421320.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147755 + ... + 215685.

It is an arithmetic number, because the mean of its divisors is an integer number (275124600).

Almost surely, 2^12344421320 is an apocalyptic number.

12344421320 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 12344421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17607974400).

12344421320 is an abundant number, since it is smaller than the sum of its proper divisors (22871527480).

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

12344421320 is a wasteful number, since it uses less digits than its factorization.

12344421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68019 (or 68015 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 12344421320 its reverse (2312444321), we get a palindrome (14656865641).

The spelling of 12344421320 in words is "twelve billion, three hundred forty-four million, four hundred twenty-one thousand, three hundred twenty".