20442042410197 has 2 divisors, whose sum is σ = 20442042410198. Its totient is φ = 20442042410196.

The previous prime is 20442042410171. The next prime is 20442042410299. The reversal of 20442042410197 is 79101424024402.

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., 20387627050756 + 54415359441 = 4515266^2 + 233271^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442042410197 - 2¹¹ = 20442042408149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442042410497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221021205098 + 10221021205099.

It is an arithmetic number, because the mean of its divisors is an integer number (10221021205099).

Almost surely, 2^{20442042410197} is an apocalyptic number.

It is an amenable number.

20442042410197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442042410197 is an equidigital number, since it uses as much as digits as its factorization.

20442042410197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 40.

Adding to 20442042410197 its reverse (79101424024402), we get a palindrome (99543466434599).

The spelling of 20442042410197 in words is "twenty trillion, four hundred forty-two billion, forty-two million, four hundred ten thousand, one hundred ninety-seven".