13144117220 has 24 divisors (see below), whose sum is σ = 29725927224. Its totient is φ = 4853212416.

The previous prime is 13144117213. The next prime is 13144117229. The reversal of 13144117220 is 2271144131.

It can be written as a sum of positive squares in 4 ways, for example, as 909987556 + 12234129664 = 30166^2 + 110608^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 13144117220.

It is not an unprimeable number, because it can be changed into a prime (13144117229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25276889 + ... + 25277408.

It is an arithmetic number, because the mean of its divisors is an integer number (1238580301).

Almost surely, 2^13144117220 is an apocalyptic number.

13144117220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13144117220 is an abundant number, since it is smaller than the sum of its proper divisors (16581810004).

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

13144117220 is a wasteful number, since it uses less digits than its factorization.

13144117220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50554319 (or 50554317 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The spelling of 13144117220 in words is "thirteen billion, one hundred forty-four million, one hundred seventeen thousand, two hundred twenty".