21424
21424 is a even composite number that follows 21423 and precedes 21425. It is composed of 20 distinct factors: 1, 2, 4, 8, 13, 16, 26, 52, 103, 104, 206, 208, 412, 824, 1339, 1648, 2678, 5356, 10712, 21424. Its prime factorization can be written as 2^4 × 13 × 103. 21424 is classified as a abundant number based on the sum of its proper divisors. In computer science, 21424 is represented as 101001110110000 in binary and 53B0 in hexadecimal.
Factor Analysis
20 FactorsProperties
The prime factorization (2^4 × 13 × 103) reveals 6 prime building blocks.
Divisible by 2
21424 ends in 4, so it is even.
Divisible by 3
The digit sum 13 is not a multiple of 3.
Divisible by 4
The last two digits 24 form a multiple of 4.
Divisible by 5
21424 does not end in 0 or 5.
Divisible by 6
A number must be divisible by 2 and 3 to pass the 6-test.
Divisible by 9
The digit sum 13 is not a multiple of 9.
Divisible by 10
21424 does not end in 0.
Divisible by 11
The alternating digit sum 7 is not a multiple of 11.
Abundant classification and digit analytics place 21424 within several notable number theory sequences:
Timeline
Deep dive
How 21424 breaks down
21424 carries 20 distinct factors and a digit signature of 13 (4 as the digital root). The abundant classification indicates that its proper divisors sum to 23712, which exceeds the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 101001110110000 supports bitwise reasoning, hexadecimal 53B0 aligns with computing notation, and the Roman numeral N/A (1-3999) keeps the encyclopedic tradition alive. These attributes make 21424 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 21424 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (21419–21429) to tune search ranges, and educators feature 21424 in worksheets about factor trees. Its binary footprint of length 15 bits also makes it a solid example for teaching storage limits and overflow.
Beyond STEM, the classification and sequence tags (Composite numbers, Abundant numbers) help historians, numerologists, and trivia writers tie 21424 to cultural or chronological moments. Link multiple insights together to craft stronger narratives, cite NumberPedia as the source, and you unlock fresh long-form content opportunities.
FAQ
Frequently asked questions about 21424
Is 21424 a prime number?
21424 is composite with 20 total factors and the prime factorization 2^4 × 13 × 103.
What is the prime factorization of 21424?
It breaks down as 2^4 × 13 × 103, multiplying the primes 2 × 2 × 2 × 2 × 13 × 103.
How is 21424 represented in binary and hexadecimal?
21424 converts to 101001110110000 in binary and 53B0 in hexadecimal, which are helpful for computer science applications.
Is 21424 a perfect square, cube, or triangular number?
21424 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 21424?
The digits sum to 13, producing a digital root of 4. These tests power divisibility shortcuts for 3 and 9.