20622271 has 4 divisors (see below), whose sum is σ = 20748952. Its totient is φ = 20495592.

The previous prime is 20622257. The next prime is 20622289. The reversal of 20622271 is 17222602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17222602 = 2 ⋅8611301.

It is a cyclic number.

It is not a de Polignac number, because 20622271 - 2⁹ = 20621759 is a prime.

It is a super-2 number, since 2×20622271² = 850556122394882, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63096 + ... + 63421.

It is an arithmetic number, because the mean of its divisors is an integer number (5187238).

Almost surely, 2^20622271 is an apocalyptic number.

20622271 is a deficient number, since it is larger than the sum of its proper divisors (126681).

20622271 is a wasteful number, since it uses less digits than its factorization.

20622271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126680.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20622271 is about 4541.1750681955. The cubic root of 20622271 is about 274.2282317046.

Adding to 20622271 its reverse (17222602), we get a palindrome (37844873).

The spelling of 20622271 in words is "twenty million, six hundred twenty-two thousand, two hundred seventy-one".