20266171 has 2 divisors, whose sum is σ = 20266172. Its totient is φ = 20266170.

The previous prime is 20266153. The next prime is 20266199. The reversal of 20266171 is 17166202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20266171 - 2¹⁷ = 20135099 is a prime.

It is not a weakly prime, because it can be changed into another prime (20266111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10133085 + 10133086.

It is an arithmetic number, because the mean of its divisors is an integer number (10133086).

Almost surely, 2^20266171 is an apocalyptic number.

20266171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20266171 is an equidigital number, since it uses as much as digits as its factorization.

20266171 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 20266171 is about 4501.7964192087. The cubic root of 20266171 is about 272.6406243290.

The spelling of 20266171 in words is "twenty million, two hundred sixty-six thousand, one hundred seventy-one".