20442267707717 has 2 divisors, whose sum is σ = 20442267707718. Its totient is φ = 20442267707716.

The previous prime is 20442267707629. The next prime is 20442267707789. The reversal of 20442267707717 is 71770776224402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15415564702756 + 5026703004961 = 3926266^2 + 2242031^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442267707717 - 2²⁰ = 20442266659141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442267707417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221133853858 + 10221133853859.

It is an arithmetic number, because the mean of its divisors is an integer number (10221133853859).

Almost surely, 2^{20442267707717} is an apocalyptic number.

It is an amenable number.

20442267707717 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442267707717 is an equidigital number, since it uses as much as digits as its factorization.

20442267707717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12907776, while the sum is 56.

The spelling of 20442267707717 in words is "twenty trillion, four hundred forty-two billion, two hundred sixty-seven million, seven hundred seven thousand, seven hundred seventeen".