20195297 has 2 divisors, whose sum is σ = 20195298. Its totient is φ = 20195296.

The previous prime is 20195267. The next prime is 20195363. The reversal of 20195297 is 79259102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17606416 + 2588881 = 4196^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 20195297 - 2¹⁴ = 20178913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20195267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097648 + 10097649.

It is an arithmetic number, because the mean of its divisors is an integer number (10097649).

Almost surely, 2^20195297 is an apocalyptic number.

It is an amenable number.

20195297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20195297 is an equidigital number, since it uses as much as digits as its factorization.

20195297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 20195297 is about 4493.9177785091. The cubic root of 20195297 is about 272.3224306781.

The spelling of 20195297 in words is "twenty million, one hundred ninety-five thousand, two hundred ninety-seven".