12345678910

12345678910 is the decimal numeral for the integer 12,345,678,910. It is formed by concatenating the decimal representations of the integers 1 through 10, yielding the digit sequence 1,2,3,4,5,6,7,8,9,10 and producing the 11-digit number 12345678910.

In decimal form, the value is 12,345,678,910. It can be written as 10 × 1,234,567,891. The number ends with a zero, so it is divisible by 10, and hence by both 2 and 5. It is not divisible by 3, since the sum of its digits is 46. Consequently, it is not a multiple of 9 or 3. The number’s magnitude is about 1.234567891 × 10^10 in scientific notation.

As a concatenation of consecutive integers from 1 to 10, the string 12345678910 is sometimes cited in discussions of numeral representations and string manipulation, particularly in programming tasks that involve assembling sequences of integers. It also has the property of containing all decimal digits 0 through 9 at least once, though some digits appear more than once (for example, the digit 1 appears twice).

Overall, 12345678910 serves as an example of a large, easily described decimal integer that arises from a simple concatenation pattern, illustrating how number form and value relate in base-10 notation.

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