13444421320 has 96 divisors (see below), whose sum is σ = 33295368960. Its totient is φ = 4882204800.

The previous prime is 13444421317. The next prime is 13444421327. The reversal of 13444421320 is 2312444431.

It is not an unprimeable number, because it can be changed into a prime (13444421327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4795039 + ... + 4797841.

It is an arithmetic number, because the mean of its divisors is an integer number (346826760).

Almost surely, 2^13444421320 is an apocalyptic number.

13444421320 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 13444421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16647684480).

13444421320 is an abundant number, since it is smaller than the sum of its proper divisors (19850947640).

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

13444421320 is a wasteful number, since it uses less digits than its factorization.

13444421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3827 (or 3812 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 13444421320 its reverse (2312444431), we get a palindrome (15756865751).

The spelling of 13444421320 in words is "thirteen billion, four hundred forty-four million, four hundred twenty-one thousand, three hundred twenty".