1444204420013 has 4 divisors (see below), whose sum is σ = 1444246859580. Its totient is φ = 1444161980448.

The previous prime is 1444204420007. The next prime is 1444204420049. The reversal of 1444204420013 is 3100244024441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1206511118569 + 237693301444 = 1098413^2 + 487538^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444204420013 - 2²⁰ = 1444203371437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444204420313) 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, 21168698 + ... + 21236811.

It is an arithmetic number, because the mean of its divisors is an integer number (361061714895).

Almost surely, 2^{1444204420013} is an apocalyptic number.

It is an amenable number.

1444204420013 is a deficient number, since it is larger than the sum of its proper divisors (42439567).

1444204420013 is an equidigital number, since it uses as much as digits as its factorization.

1444204420013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42439566.

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

Adding to 1444204420013 its reverse (3100244024441), we get a palindrome (4544448444454).

The spelling of 1444204420013 in words is "one trillion, four hundred forty-four billion, two hundred four million, four hundred twenty thousand, thirteen".