13021343444 has 12 divisors (see below), whose sum is σ = 22913249268. Its totient is φ = 6474700800.

The previous prime is 13021343431. The next prime is 13021343449. The reversal of 13021343444 is 44434312031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2985311044 + 10036032400 = 54638^2 + 100180^2 .

It is a super-2 number, since 2×13021343444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021343449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8991917 + ... + 8993364.

It is an arithmetic number, because the mean of its divisors is an integer number (1909437439).

Almost surely, 2^13021343444 is an apocalyptic number.

It is an amenable number.

13021343444 is a deficient number, since it is larger than the sum of its proper divisors (9891905824).

13021343444 is a wasteful number, since it uses less digits than its factorization.

13021343444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17985466 (or 17985464 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 13021343444 its reverse (44434312031), we get a palindrome (57455655475).

The spelling of 13021343444 in words is "thirteen billion, twenty-one million, three hundred forty-three thousand, four hundred forty-four".