20106171 has 24 divisors (see below), whose sum is σ = 30496880. Its totient is φ = 13089600.

The previous prime is 20106167. The next prime is 20106173. The reversal of 20106171 is 17160102.

It is not a de Polignac number, because 20106171 - 2² = 20106167 is a prime.

It is a super-2 number, since 2×20106171² = 808516224562482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199021 + ... + 199121.

Almost surely, 2^20106171 is an apocalyptic number.

20106171 is a deficient number, since it is larger than the sum of its proper divisors (10390709).

20106171 is an equidigital number, since it uses as much as digits as its factorization.

20106171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 20106171 is about 4483.9905218455. The cubic root of 20106171 is about 271.9212349430.

Adding to 20106171 its reverse (17160102), we get a palindrome (37266273).

The spelling of 20106171 in words is "twenty million, one hundred six thousand, one hundred seventy-one".