20444240320401 has 4 divisors (see below), whose sum is σ = 27258987093872. Its totient is φ = 13629493546932.

The previous prime is 20444240320391. The next prime is 20444240320421. The reversal of 20444240320401 is 10402304244402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20444240320401 - 2⁶ = 20444240320337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20444240320421) 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, 3407373386731 + ... + 3407373386736.

It is an arithmetic number, because the mean of its divisors is an integer number (6814746773468).

Almost surely, 2^{20444240320401} is an apocalyptic number.

It is an amenable number.

20444240320401 is a deficient number, since it is larger than the sum of its proper divisors (6814746773471).

20444240320401 is an equidigital number, since it uses as much as digits as its factorization.

20444240320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814746773470.

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 20444240320401 its reverse (10402304244402), we get a palindrome (30846544564803).

The spelling of 20444240320401 in words is "twenty trillion, four hundred forty-four billion, two hundred forty million, three hundred twenty thousand, four hundred one".