20834173 has 4 divisors (see below), whose sum is σ = 20880220. Its totient is φ = 20788128.

The previous prime is 20834167. The next prime is 20834213. The reversal of 20834173 is 37143802.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11580409 + 9253764 = 3403^2 + 3042^2 .

It is a cyclic number.

It is not a de Polignac number, because 20834173 - 2⁹ = 20833661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20834153) 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, 22338 + ... + 23251.

It is an arithmetic number, because the mean of its divisors is an integer number (5220055).

Almost surely, 2^20834173 is an apocalyptic number.

It is an amenable number.

20834173 is a deficient number, since it is larger than the sum of its proper divisors (46047).

20834173 is an equidigital number, since it uses as much as digits as its factorization.

20834173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46046.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20834173 is about 4564.4466258244. The cubic root of 20834173 is about 275.1643007159.

Adding to 20834173 its reverse (37143802), we get a palindrome (57977975).

The spelling of 20834173 in words is "twenty million, eight hundred thirty-four thousand, one hundred seventy-three".