20200220197 has 2 divisors, whose sum is σ = 20200220198. Its totient is φ = 20200220196.

The previous prime is 20200220171. The next prime is 20200220207. The reversal of 20200220197 is 79102200202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14504348356 + 5695871841 = 120434^2 + 75471^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200220197 - 2⁷ = 20200220069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200220147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100110098 + 10100110099.

It is an arithmetic number, because the mean of its divisors is an integer number (10100110099).

Almost surely, 2^20200220197 is an apocalyptic number.

It is an amenable number.

20200220197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200220197 is an equidigital number, since it uses as much as digits as its factorization.

20200220197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 20200220197 its reverse (79102200202), we get a palindrome (99302420399).

The spelling of 20200220197 in words is "twenty billion, two hundred million, two hundred twenty thousand, one hundred ninety-seven".