20012004

20012004 is an eight-digit numeral formed by concatenating the four-digit years 2001 and 2004. It is not a standard calendar date by itself, but it appears as a label or identifier in contexts where a compact reference to a time span or a specific batch is needed.

In time-interval or data contexts, 20012004 can denote the period from 2001 through 2004 inclusive. This usage is common in project planning, archival labeling, data collection, and other situations where a continuous multi-year window is referenced without listing each year separately. It may also be employed to indicate seasons, cohorts, or editions that span those years in academic, athletic, or organizational calendars.

As an identifier, the sequence is sometimes used for model numbers, product codes, batch identifiers, or dataset naming. Because it combines two consecutive years, the label can imply provenance, versioning, or a time-based grouping without specifying more granular dates.

Numerically, the string 20012004 represents the integer 20,012,004. It is divisible by 4 and by 9, with a cofactor of 555,889, giving a factorization of 20,012,004 = 36 × 555,889. Beyond its usage as a label, it is a simple example of how year-based strings can be repurposed as identifiers in various domains.

See also: 2001, 2004, 2001–2004, year ranges.