20444122313449 has 2 divisors, whose sum is σ = 20444122313450. Its totient is φ = 20444122313448.

The previous prime is 20444122313441. The next prime is 20444122313473. The reversal of 20444122313449 is 94431322144402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14559131503449 + 5884990810000 = 3815643^2 + 2425900^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444122313449 - 2³ = 20444122313441 is a prime.

It is not a weakly prime, because it can be changed into another prime (20444122313441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222061156724 + 10222061156725.

It is an arithmetic number, because the mean of its divisors is an integer number (10222061156725).

Almost surely, 2^{20444122313449} is an apocalyptic number.

It is an amenable number.

20444122313449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20444122313449 is an equidigital number, since it uses as much as digits as its factorization.

20444122313449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 20444122313449 in words is "twenty trillion, four hundred forty-four billion, one hundred twenty-two million, three hundred thirteen thousand, four hundred forty-nine".