20771164 has 12 divisors (see below), whose sum is σ = 36412600. Its totient is φ = 10367568.

The previous prime is 20771159. The next prime is 20771167. The reversal of 20771164 is 46117702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771167) 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, 1719 + ... + 6670.

Almost surely, 2^20771164 is an apocalyptic number.

It is an amenable number.

20771164 is a deficient number, since it is larger than the sum of its proper divisors (15641436).

20771164 is a wasteful number, since it uses less digits than its factorization.

20771164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9012 (or 9010 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 20771164 is about 4557.5392483225. The cubic root of 20771164 is about 274.8866265445.

Adding to 20771164 its reverse (46117702), we get a palindrome (66888866).

The spelling of 20771164 in words is "twenty million, seven hundred seventy-one thousand, one hundred sixty-four".