20486171 has 2 divisors, whose sum is σ = 20486172. Its totient is φ = 20486170.

The previous prime is 20486153. The next prime is 20486177. The reversal of 20486171 is 17168402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20486171 - 2⁶ = 20486107 is a prime.

It is not a weakly prime, because it can be changed into another prime (20486177) 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, 10243085 + 10243086.

It is an arithmetic number, because the mean of its divisors is an integer number (10243086).

Almost surely, 2^20486171 is an apocalyptic number.

20486171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20486171 is an equidigital number, since it uses as much as digits as its factorization.

20486171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20486171 is about 4526.1651538582. The cubic root of 20486171 is about 273.6236285565.

The spelling of 20486171 in words is "twenty million, four hundred eighty-six thousand, one hundred seventy-one".