21712

21712 is the natural number that follows 21711 and precedes 21713. It is an even, composite integer used in arithmetic, counting, and enumeration.

Its prime factorization is 2^4 × 23 × 59. Consequently, 21712 has 20 positive divisors. The sum of all divisors is 44,640, which yields an aliquot sum (sum of proper divisors) of 22,928. The number is not prime, not a perfect square, and not a perfect cube. In base 2, 21712 is represented as 101010011010000. The decimal digit sum is 13, indicating it is not divisible by 3.

Beyond pure mathematics, 21712 can appear as an identifier in various registries and catalogs. For example, it might be used as a catalog or part number, an entry in an indexing system, or a regional code in a postal or logistics framework. The exact meaning of 21712 in such contexts depends on the specific registry, jurisdiction, or organizational scheme involved.

In summary, 21712 is a composite five-digit integer with a known prime factorization, divisor structure, and binary representation. Its value and properties are of interest primarily in arithmetic and number theory, while its use as an identifier in broader systems reflects the common practice of assigning numeric codes across diverse domains.