20600197 has 2 divisors, whose sum is σ = 20600198. Its totient is φ = 20600196.

The previous prime is 20600149. The next prime is 20600201. The reversal of 20600197 is 79100602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20061441 + 538756 = 4479^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 20600197 - 2¹⁵ = 20567429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20600117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300098 + 10300099.

It is an arithmetic number, because the mean of its divisors is an integer number (10300099).

Almost surely, 2^20600197 is an apocalyptic number.

It is an amenable number.

20600197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20600197 is an equidigital number, since it uses as much as digits as its factorization.

20600197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20600197 is about 4538.7439892552. The cubic root of 20600197 is about 274.1303524897.

Adding to 20600197 its reverse (79100602), we get a palindrome (99700799).

The spelling of 20600197 in words is "twenty million, six hundred thousand, one hundred ninety-seven".