20240197 has 2 divisors, whose sum is σ = 20240198. Its totient is φ = 20240196.

The previous prime is 20240189. The next prime is 20240219. The reversal of 20240197 is 79104202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17926756 + 2313441 = 4234^2 + 1521^2 .

It is a cyclic number.

It is not a de Polignac number, because 20240197 - 2³ = 20240189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20240107) 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, 10120098 + 10120099.

It is an arithmetic number, because the mean of its divisors is an integer number (10120099).

Almost surely, 2^20240197 is an apocalyptic number.

It is an amenable number.

20240197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20240197 is an equidigital number, since it uses as much as digits as its factorization.

20240197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20240197 is about 4498.9106459231. The cubic root of 20240197 is about 272.5240985337.

Adding to 20240197 its reverse (79104202), we get a palindrome (99344399).

The spelling of 20240197 in words is "twenty million, two hundred forty thousand, one hundred ninety-seven".