20442315017 has 2 divisors, whose sum is σ = 20442315018. Its totient is φ = 20442315016.

The previous prime is 20442315007. The next prime is 20442315043. The reversal of 20442315017 is 71051324402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19906670281 + 535644736 = 141091^2 + 23144^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442315017 - 2⁶ = 20442314953 is a prime.

It is not a weakly prime, because it can be changed into another prime (20442315007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221157508 + 10221157509.

It is an arithmetic number, because the mean of its divisors is an integer number (10221157509).

Almost surely, 2^20442315017 is an apocalyptic number.

It is an amenable number.

20442315017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442315017 is an equidigital number, since it uses as much as digits as its factorization.

20442315017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 20442315017 its reverse (71051324402), we get a palindrome (91493639419).

The spelling of 20442315017 in words is "twenty billion, four hundred forty-two million, three hundred fifteen thousand, seventeen".