13444221986 has 16 divisors (see below), whose sum is σ = 21961611000. Its totient is φ = 6135305088.

The previous prime is 13444221977. The next prime is 13444221991. The reversal of 13444221986 is 68912244431.

It can be written as a sum of positive squares in 4 ways, for example, as 11603382961 + 1840839025 = 107719^2 + 42905^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2902661 + ... + 2907288.

Almost surely, 2^13444221986 is an apocalyptic number.

13444221986 is a deficient number, since it is larger than the sum of its proper divisors (8517389014).

13444221986 is a wasteful number, since it uses less digits than its factorization.

13444221986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5810053.

The product of its digits is 331776, while the sum is 44.

The spelling of 13444221986 in words is "thirteen billion, four hundred forty-four million, two hundred twenty-one thousand, nine hundred eighty-six".