20442756097 has 2 divisors, whose sum is σ = 20442756098. Its totient is φ = 20442756096.

The previous prime is 20442756083. The next prime is 20442756133. The reversal of 20442756097 is 79065724402.

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., 10467540721 + 9975215376 = 102311^2 + 99876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20442756097 is a prime.

It is not a weakly prime, because it can be changed into another prime (20442756007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221378048 + 10221378049.

It is an arithmetic number, because the mean of its divisors is an integer number (10221378049).

Almost surely, 2^20442756097 is an apocalyptic number.

It is an amenable number.

20442756097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442756097 is an equidigital number, since it uses as much as digits as its factorization.

20442756097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 20442756097 in words is "twenty billion, four hundred forty-two million, seven hundred fifty-six thousand, ninety-seven".