20442311041391 has 2 divisors, whose sum is σ = 20442311041392. Its totient is φ = 20442311041390.

The previous prime is 20442311041319. The next prime is 20442311041469. The reversal of 20442311041391 is 19314011324402.

Together with previous prime (20442311041319) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20442311041391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442311044391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221155520695 + 10221155520696.

It is an arithmetic number, because the mean of its divisors is an integer number (10221155520696).

Almost surely, 2^{20442311041391} is an apocalyptic number.

20442311041391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442311041391 is an equidigital number, since it uses as much as digits as its factorization.

20442311041391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

Adding to 20442311041391 its reverse (19314011324402), we get a palindrome (39756322365793).

The spelling of 20442311041391 in words is "twenty trillion, four hundred forty-two billion, three hundred eleven million, forty-one thousand, three hundred ninety-one".