20202000000197 has 2 divisors, whose sum is σ = 20202000000198. Its totient is φ = 20202000000196.

The previous prime is 20202000000167. The next prime is 20202000000293. The reversal of 20202000000197 is 79100000020202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19320868593601 + 881131406596 = 4395551^2 + 938686^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202000000197 - 2³⁴ = 20184820131013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202000000137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101000000098 + 10101000000099.

It is an arithmetic number, because the mean of its divisors is an integer number (10101000000099).

Almost surely, 2^{20202000000197} is an apocalyptic number.

It is an amenable number.

20202000000197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202000000197 is an equidigital number, since it uses as much as digits as its factorization.

20202000000197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 20202000000197 its reverse (79100000020202), we get a palindrome (99302000020399).

The spelling of 20202000000197 in words is "twenty trillion, two hundred two billion, one hundred ninety-seven", and thus it is an aban number.