20267197 has 2 divisors, whose sum is σ = 20267198. Its totient is φ = 20267196.

The previous prime is 20267119. The next prime is 20267227. The reversal of 20267197 is 79176202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19660356 + 606841 = 4434^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 20267197 - 2¹⁵ = 20234429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20267297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10133598 + 10133599.

It is an arithmetic number, because the mean of its divisors is an integer number (10133599).

Almost surely, 2^20267197 is an apocalyptic number.

It is an amenable number.

20267197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20267197 is an equidigital number, since it uses as much as digits as its factorization.

20267197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 20267197 is about 4501.9103722753. The cubic root of 20267197 is about 272.6452251744.

The spelling of 20267197 in words is "twenty million, two hundred sixty-seven thousand, one hundred ninety-seven".