0o21644

0o21644 is an octal numeral, written with the 0o prefix to indicate base-8 notation. The digits 2, 1, 6, 4, and 4 are valid in octal (0–7). As a decimal value, 0o21644 equals 9124. In hexadecimal, it corresponds to 0x23A4. A binary representation is 010001110100100 (that is, 0b010001110100100).

In programming, 0o21644 serves as an example of an octal integer literal. Languages that support the 0o prefix include Python 3 and JavaScript (ES6). In Python 3, for instance, the expression 0o21644 evaluates to the integer 9124, and it can be converted or used in arithmetic just like decimal numbers.

Notes on notation and history: the 0o prefix was introduced to clearly distinguish octal literals from decimal and hexadecimal forms, helping avoid ambiguity that could arise with older conventions that used a leading zero or other markers. This makes octal values more readable and prevents misinterpretation in code that mixes numeral bases.

Overall, 0o21644 illustrates how octal literals are written and interpreted across common programming environments, highlighting the base-8 representation, the decimal and hex equivalents, and typical language support.