13144391220 has 96 divisors (see below), whose sum is σ = 38212070400. Its totient is φ = 3372410880.

The previous prime is 13144391219. The next prime is 13144391257. The reversal of 13144391220 is 2219344131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 301356 + ... + 342204.

It is an arithmetic number, because the mean of its divisors is an integer number (398042400).

Almost surely, 2^13144391220 is an apocalyptic number.

13144391220 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 13144391220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19106035200).

13144391220 is an abundant number, since it is smaller than the sum of its proper divisors (25067679180).

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

13144391220 is a wasteful number, since it uses less digits than its factorization.

13144391220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41065 (or 41063 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 13144391220 in words is "thirteen billion, one hundred forty-four million, three hundred ninety-one thousand, two hundred twenty".