18231852

18231852 is an eight-digit decimal numeral. In mathematics and data contexts, it is commonly encountered as a sample integer used in teaching about divisibility, factorization, and numerical structure. As a string of digits, it has potential to appear in identifiers, catalog numbers, and datasets that require fixed-length numeric codes.

Numerical properties: The number is even, so divisible by 2. The last two digits are 52, implying divisibility by 4; in fact 18231852 / 4 = 4,557,963. The digit sum is 30, so the number is divisible by 3, but not by 9. Thus it is divisible by 3 as well: 18,231,852 / 3 = 6,077,284. The prime factorization begins as 2^2 × 3 × 1,519,321; 1,519,321 is a larger cofactor and may be prime or require further factoring by a computer.

Structure and patterns: The digits 18 and 23 form two two-digit numbers that appear in sequence within the string, and the trailing 1852 resembles a year. The concatenation 18-23-1852 is sometimes noted as an example of embedded subnumbers. The arrangement is not known to encode any widely used date or geographic code, but as a fixed-length code it could be used in databases that require eight-digit identifiers.

Applications: As a hypothetical identifier, 18231852 could be used in library systems, product SKUs, or dataset keys. In educational contexts, it is often used as a sample input for exercises on divisibility and factorization due to its mixture of small and large factors.

See also: Number theory, Divisibility tests, Factorization.