View source for Evil number (nonfiction)

In number theory, an '''evil number''' is a non-negative [[Number (nonfiction)|number]] that has an even number of 1s in its binary expansion.

The first evil numbers are: 0, 3, 5, 6, 9, 10, 12, 15, 17, 18, 20, 23, 24, 27, 29, 30, 33, 34, 36, 39 ...

Numbers that are not evil are called [[Odious number (nonfiction)|odious numbers]].

Not to be confused with [[Evil bit (nonfiction)]].

== In the News ==

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== Fiction cross-reference ==

* [[Crimes against mathematical constants]]

== Nonfiction cross-reference ==

* [[Evil bit (nonfiction)]]
* [[Number (nonfiction)]]
* [[Odious number (nonfiction)]]

External links:

* [https://en.wikipedia.org/wiki/Evil_number Evil number] @ Wikipedia


[[Category:Nonfiction (nonfiction)]]
[[Category:Mathematics (nonfiction)]]
[[Category:Numbers (nonfiction)]]
[[Category:Number theory (nonfiction)]]