20601197 has 2 divisors, whose sum is σ = 20601198. Its totient is φ = 20601196.

The previous prime is 20601179. The next prime is 20601199. The reversal of 20601197 is 79110602.

Together with previous prime (20601179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18887716 + 1713481 = 4346^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 20601197 - 2¹⁶ = 20535661 is a prime.

Together with 20601199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20601199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10300598 + 10300599.

It is an arithmetic number, because the mean of its divisors is an integer number (10300599).

Almost surely, 2^20601197 is an apocalyptic number.

It is an amenable number.

20601197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20601197 is an equidigital number, since it uses as much as digits as its factorization.

20601197 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 26.

The square root of 20601197 is about 4538.8541505539. The cubic root of 20601197 is about 274.1347881417.

Adding to 20601197 its reverse (79110602), we get a palindrome (99711799).

The spelling of 20601197 in words is "twenty million, six hundred one thousand, one hundred ninety-seven".