20009182020197 has 2 divisors, whose sum is σ = 20009182020198. Its totient is φ = 20009182020196.

The previous prime is 20009182020169. The next prime is 20009182020301. The reversal of 20009182020197 is 79102028190002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17815566280801 + 2193615739396 = 4220849^2 + 1481086^2 .

It is a cyclic number.

It is not a de Polignac number, because 20009182020197 - 2²⁴ = 20009165242981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20009182020397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004591010098 + 10004591010099.

It is an arithmetic number, because the mean of its divisors is an integer number (10004591010099).

Almost surely, 2^{20009182020197} is an apocalyptic number.

It is an amenable number.

20009182020197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20009182020197 is an equidigital number, since it uses as much as digits as its factorization.

20009182020197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 20009182020197 in words is "twenty trillion, nine billion, one hundred eighty-two million, twenty thousand, one hundred ninety-seven".