20227171 has 4 divisors (see below), whose sum is σ = 20270952. Its totient is φ = 20183392.

The previous prime is 20227133. The next prime is 20227217. The reversal of 20227171 is 17172202.

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

It is a cyclic number.

It is not a de Polignac number, because 20227171 - 2⁷ = 20227043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20227121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21190 + ... + 22123.

It is an arithmetic number, because the mean of its divisors is an integer number (5067738).

Almost surely, 2^20227171 is an apocalyptic number.

20227171 is a deficient number, since it is larger than the sum of its proper divisors (43781).

20227171 is an equidigital number, since it uses as much as digits as its factorization.

20227171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43780.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 20227171 is about 4497.4627291396. The cubic root of 20227171 is about 272.4656231359.

Adding to 20227171 its reverse (17172202), we get a palindrome (37399373).

The spelling of 20227171 in words is "twenty million, two hundred twenty-seven thousand, one hundred seventy-one".