20656

20656 is a natural number that follows 20655 and precedes 20657. It is even and composite.

In mathematics, the prime factorization of 20656 is 2^4 × 1291, which means it has 10 positive divisors: 1, 2, 4, 8, 16, 1291, 2582, 5164, 10328, and 20656. The sum of its digits is 19, so it is not divisible by 3. It is divisible by 8 and by 16 but not by 32. In binary, 20656 is 0101000010110000, and in hexadecimal it is 0x50B0.

As a five-digit decimal integer, 20656 can appear in various coding contexts such as identifiers, catalog numbers, or postal codes in systems that use five-digit codes. In recreational number theory, it is notable for its factorization into a small power of two and a larger prime, as well as for having exactly 10 divisors.

The number does not carry a widely recognized historical or mathematical significance beyond its basic arithmetic properties. It serves as an example of an even, composite number with a relatively simple prime factorization and a modest divisor count.