13331444220 has 144 divisors (see below), whose sum is σ = 41289393600. Its totient is φ = 3480960000.

The previous prime is 13331444219. The next prime is 13331444227. The reversal of 13331444220 is 2244413331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331444227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1900720 + ... + 1907720.

It is an arithmetic number, because the mean of its divisors is an integer number (286731900).

Almost surely, 2^13331444220 is an apocalyptic number.

13331444220 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 13331444220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20644696800).

13331444220 is an abundant number, since it is smaller than the sum of its proper divisors (27957949380).

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

13331444220 is a wasteful number, since it uses less digits than its factorization.

13331444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236 (or 7231 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 13331444220 its reverse (2244413331), we get a palindrome (15575857551).

The spelling of 13331444220 in words is "thirteen billion, three hundred thirty-one million, four hundred forty-four thousand, two hundred twenty".