20771022 has 16 divisors (see below), whose sum is σ = 41662080. Its totient is φ = 6903672.

The previous prime is 20770973. The next prime is 20771029. The reversal of 20771022 is 22017702.

It is a self number, because there is not a number n which added to its sum of digits gives 20771022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20771029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668 + ... + 6975.

It is an arithmetic number, because the mean of its divisors is an integer number (2603880).

Almost surely, 2^20771022 is an apocalyptic number.

20771022 is an abundant number, since it is smaller than the sum of its proper divisors (20891058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20771022 is a wasteful number, since it uses less digits than its factorization.

20771022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20771022 is about 4557.5236697136. The cubic root of 20771022 is about 274.8860001314.

Adding to 20771022 its reverse (22017702), we get a palindrome (42788724).

The spelling of 20771022 in words is "twenty million, seven hundred seventy-one thousand, twenty-two".