20112020197 has 2 divisors, whose sum is σ = 20112020198. Its totient is φ = 20112020196.

The previous prime is 20112020191. The next prime is 20112020263. The reversal of 20112020197 is 79102021102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20073505761 + 38514436 = 141681^2 + 6206^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112020197 - 2⁷ = 20112020069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056010098 + 10056010099.

It is an arithmetic number, because the mean of its divisors is an integer number (10056010099).

Almost surely, 2^20112020197 is an apocalyptic number.

It is an amenable number.

20112020197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112020197 is an equidigital number, since it uses as much as digits as its factorization.

20112020197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 20112020197 its reverse (79102021102), we get a palindrome (99214041299).

The spelling of 20112020197 in words is "twenty billion, one hundred twelve million, twenty thousand, one hundred ninety-seven".