20132171 has 4 divisors (see below), whose sum is σ = 20143200. Its totient is φ = 20121144.

The previous prime is 20132149. The next prime is 20132173. The reversal of 20132171 is 17123102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 17123102 = 2 ⋅8561551.

It is a cyclic number.

It is not a de Polignac number, because 20132171 - 2¹⁰ = 20131147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20132173) 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, 2051 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (5035800).

Almost surely, 2^20132171 is an apocalyptic number.

20132171 is a deficient number, since it is larger than the sum of its proper divisors (11029).

20132171 is an equidigital number, since it uses as much as digits as its factorization.

20132171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11028.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 20132171 is about 4486.8887884591. Note that the first 3 decimals coincide. The cubic root of 20132171 is about 272.0383947747.

Adding to 20132171 its reverse (17123102), we get a palindrome (37255273).

The spelling of 20132171 in words is "twenty million, one hundred thirty-two thousand, one hundred seventy-one".