20396197 has 2 divisors, whose sum is σ = 20396198. Its totient is φ = 20396196.

The previous prime is 20396191. The next prime is 20396203. The reversal of 20396197 is 79169302.

It is a balanced prime because it is at equal distance from previous prime (20396191) and next prime (20396203).

It can be written as a sum of positive squares in only one way, i.e., 13003236 + 7392961 = 3606^2 + 2719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20396197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20396191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198098 + 10198099.

It is an arithmetic number, because the mean of its divisors is an integer number (10198099).

Almost surely, 2^20396197 is an apocalyptic number.

It is an amenable number.

20396197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20396197 is an equidigital number, since it uses as much as digits as its factorization.

20396197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 20396197 is about 4516.2148974556. The cubic root of 20396197 is about 273.2224613125. Note that the first 3 decimals are identical.

The spelling of 20396197 in words is "twenty million, three hundred ninety-six thousand, one hundred ninety-seven".