13144244420 has 12 divisors (see below), whose sum is σ = 27602913324. Its totient is φ = 5257697760.

The previous prime is 13144244419. The next prime is 13144244471. The reversal of 13144244420 is 2444244131.

It can be written as a sum of positive squares in 2 ways, for example, as 5544589444 + 7599654976 = 74462^2 + 87176^2 .

It is a super-2 number, since 2×13144244420² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328606091 + ... + 328606130.

It is an arithmetic number, because the mean of its divisors is an integer number (2300242777).

Almost surely, 2^13144244420 is an apocalyptic number.

13144244420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13144244420 is an abundant number, since it is smaller than the sum of its proper divisors (14458668904).

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

13144244420 is a wasteful number, since it uses less digits than its factorization.

13144244420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657212230 (or 657212228 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 13144244420 its reverse (2444244131), we get a palindrome (15588488551).

The spelling of 13144244420 in words is "thirteen billion, one hundred forty-four million, two hundred forty-four thousand, four hundred twenty".