even, composite, perfect square · 16th positive integer
The number 16
16 is an even composite number. It is the 16th positive integer.
Quick reference
| Prime factorization | 2 × 2 × 2 × 2 |
| Divisors | 1, 2, 4, 8, 16 |
| Binary | 10000 |
| Hexadecimal | 0x10 |
| Roman numeral | XVI |
| Digit sum | 7 |
| Properties | even, composite, perfect square |
Reading 16 in NumGrid context
16 is one of the data points covered by this site’s integer properties and number-guessing puzzles dataset. The detail above comes directly from classical number theory plus NumGrid solver-derived puzzle statistics; the context that follows situates the headline numbers against the broader distribution across positive integers within the NumGrid target pool.
The methodology behind every numeric value on this page is publicly documented on the classical number theory plus NumGrid solver-derived puzzle statistics portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 16’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Frequently asked
Is 16 a prime number?
No. 16 is composite. Its prime factorization is 2 × 2 × 2 × 2.
What are the factors of 16?
The factors (divisors) of 16 are 1, 2, 4, 8, 16.
What is 16 in binary?
16 in binary is 10000. In hexadecimal it's 10.
What is 16 as a Roman numeral?
16 in Roman numerals is XVI.
What's the digit sum of 16?
Adding the digits of 16: 1 + 6 = 7.