20800171 has 8 divisors (see below), whose sum is σ = 23851520. Its totient is φ = 17768808.

The previous prime is 20800159. The next prime is 20800177. The reversal of 20800171 is 17100802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20800171 - 2⁵ = 20800139 is a prime.

It is a super-2 number, since 2×20800171² = 865294227258482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20800177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2691 + ... + 6988.

It is an arithmetic number, because the mean of its divisors is an integer number (2981440).

Almost surely, 2^20800171 is an apocalyptic number.

20800171 is a deficient number, since it is larger than the sum of its proper divisors (3051349).

20800171 is an equidigital number, since it uses as much as digits as its factorization.

20800171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9993.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 20800171 is about 4560.7204474732. The cubic root of 20800171 is about 275.0145270563.

Adding to 20800171 its reverse (17100802), we get a palindrome (37900973).

The spelling of 20800171 in words is "twenty million, eight hundred thousand, one hundred seventy-one".