20268197 has 2 divisors, whose sum is σ = 20268198. Its totient is φ = 20268196.

The previous prime is 20268169. The next prime is 20268239. The reversal of 20268197 is 79186202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13293316 + 6974881 = 3646^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 20268197 - 2¹⁸ = 20006053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20268107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10134098 + 10134099.

It is an arithmetic number, because the mean of its divisors is an integer number (10134099).

Almost surely, 2^20268197 is an apocalyptic number.

It is an amenable number.

20268197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20268197 is an equidigital number, since it uses as much as digits as its factorization.

20268197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 20268197 is about 4502.0214348668. The cubic root of 20268197 is about 272.6497092798.

The spelling of 20268197 in words is "twenty million, two hundred sixty-eight thousand, one hundred ninety-seven".