20850171 has 4 divisors (see below), whose sum is σ = 27800232. Its totient is φ = 13900112.

The previous prime is 20850169. The next prime is 20850223. The reversal of 20850171 is 17105802.

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 20850171 - 2¹ = 20850169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20850131) 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, 3475026 + ... + 3475031.

It is an arithmetic number, because the mean of its divisors is an integer number (6950058).

Almost surely, 2^20850171 is an apocalyptic number.

20850171 is a deficient number, since it is larger than the sum of its proper divisors (6950061).

20850171 is an equidigital number, since it uses as much as digits as its factorization.

20850171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950060.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 20850171 is about 4566.1987473171. The cubic root of 20850171 is about 275.2347131135.

Adding to 20850171 its reverse (17105802), we get a palindrome (37955973).

The spelling of 20850171 in words is "twenty million, eight hundred fifty thousand, one hundred seventy-one".