20271171 has 4 divisors (see below), whose sum is σ = 27028232. Its totient is φ = 13514112.

The previous prime is 20271131. The next prime is 20271187. The reversal of 20271171 is 17117202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20271171 - 2⁶ = 20271107 is a prime.

It is a super-2 number, since 2×20271171² = 821840747422482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20271101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3378526 + ... + 3378531.

It is an arithmetic number, because the mean of its divisors is an integer number (6757058).

Almost surely, 2^20271171 is an apocalyptic number.

20271171 is a deficient number, since it is larger than the sum of its proper divisors (6757061).

20271171 is an equidigital number, since it uses as much as digits as its factorization.

20271171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6757060.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 20271171 is about 4502.3517188243. The cubic root of 20271171 is about 272.6630441377.

Adding to 20271171 its reverse (17117202), we get a palindrome (37388373).

The spelling of 20271171 in words is "twenty million, two hundred seventy-one thousand, one hundred seventy-one".