20143171 has 2 divisors, whose sum is σ = 20143172. Its totient is φ = 20143170.

The previous prime is 20143157. The next prime is 20143219. The reversal of 20143171 is 17134102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20143171 - 2⁷ = 20143043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20143271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071585 + 10071586.

It is an arithmetic number, because the mean of its divisors is an integer number (10071586).

Almost surely, 2^20143171 is an apocalyptic number.

20143171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20143171 is an equidigital number, since it uses as much as digits as its factorization.

20143171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 20143171 is about 4488.1144147626. The cubic root of 20143171 is about 272.0879320302.

Adding to 20143171 its reverse (17134102), we get a palindrome (37277273).

The spelling of 20143171 in words is "twenty million, one hundred forty-three thousand, one hundred seventy-one".