20371171 has 2 divisors, whose sum is σ = 20371172. Its totient is φ = 20371170.

The previous prime is 20371159. The next prime is 20371187. The reversal of 20371171 is 17117302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20371171 - 2⁵ = 20371139 is a prime.

It is a super-2 number, since 2×20371171² = 829969215822482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20377171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185585 + 10185586.

It is an arithmetic number, because the mean of its divisors is an integer number (10185586).

Almost surely, 2^20371171 is an apocalyptic number.

20371171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20371171 is an equidigital number, since it uses as much as digits as its factorization.

20371171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 20371171 is about 4513.4433639961. The cubic root of 20371171 is about 273.1106681873.

Adding to 20371171 its reverse (17117302), we get a palindrome (37488473).

The spelling of 20371171 in words is "twenty million, three hundred seventy-one thousand, one hundred seventy-one".