20139

20139 is a natural number that also appears as a numeric identifier in several real-world systems. In pure mathematics, 20139 is an odd composite number. Its prime factorization is 3 × 7^2 × 137, making it divisible by 3, 7, 21, 49 and 147, among other divisors. The digit sum is 15, so it is divisible by 3 but not by 9.

In postal use, 20139 is designated as a United States ZIP code. ZIP codes are five-digit numbers used by the United States Postal Service to identify geographic delivery areas and route mail accordingly.

In cataloging and data management, 20139 may serve as a serial, item, or record identifier within a given database, inventory system, or library catalog. Such use is defined by the conventions of the issuing organization and may bear no direct relation to its arithmetic properties.

In speculative or fictional contexts, 20139 can be used as a year designation or a code, particularly as a distant future reference in science fiction or as a placeholder in datasets that require a large numeric label. Across these uses, the meaning of 20139 is determined by the specific domain in which it appears.