20771271 has 12 divisors (see below), whose sum is σ = 30971200. Its totient is φ = 13400640.

The previous prime is 20771269. The next prime is 20771281. The reversal of 20771271 is 17217702.

It is not a de Polignac number, because 20771271 - 2¹ = 20771269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36946 + ... + 37503.

Almost surely, 2^20771271 is an apocalyptic number.

20771271 is a deficient number, since it is larger than the sum of its proper divisors (10199929).

20771271 is a wasteful number, since it uses less digits than its factorization.

20771271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74486 (or 74483 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 20771271 is about 4557.5509870982. The cubic root of 20771271 is about 274.8870985582.

Adding to 20771271 its reverse (17217702), we get a palindrome (37988973).

The spelling of 20771271 in words is "twenty million, seven hundred seventy-one thousand, two hundred seventy-one".