Nineteen thousand, one hundred five and seven thousandths would appear, in numerical form, as follows: 19,1057⁄1000. It could also appear as 19,105.007, if the 7⁄1000 were to appear as a decimal number, rather than a fraction.

The representation of figures using numbers rather than letters and words is referred to as a numeral system. The numeral system of a country or a culture is useful as it means that each figure has its own symbolic representation, meaning numbers are less likely to be interpreted wrongly. It is also useful as it is normally quicker than writing out numbers in letters and words - after all, nineteen thousand, one hundred five and seven thousandths uses 49 letters, whereas it only uses a maximum of 10 digits, if it were written out in its decimal numerical form.

There have been a number of different numeral systems. One of the simplest numeral systems is the unary numeral system, in which every "one" which makes up a number is represented by a symbol. By way of example, if "?" meant "1", then "???" would mean "3", "?" would mean "10" and so on. However, this can be complicated and difficult to interpret when using larger numbers, such as the one you asked about. Tally charts are a common form of a unary system which is still in use today, where for every "one" which makes up a number, you draw "'" or "/", and when you get to a fifth "one" you put a horizontal line through the previous four vertical lines. Please note that tally charts sound much more complicated than they look!

The Roman numeral system of numbers is one of the oldest recorded numeral systems. The system represents the numbers one to 10, and every number greater than 10 is represented by a combination of these symbols. The symbols for the numbers one to ten are I, II, III, IV, V, VI, VII, VIII, IX and X. As you can see, I equals one, and therefore III equals one. V equals five - V with a one (I) preceding it is the equivalent of five minus one, so equals four. On the other hand, V with I succeeding it is the equivalent of five plus one, so equals six.

The representation of figures using numbers rather than letters and words is referred to as a numeral system. The numeral system of a country or a culture is useful as it means that each figure has its own symbolic representation, meaning numbers are less likely to be interpreted wrongly. It is also useful as it is normally quicker than writing out numbers in letters and words - after all, nineteen thousand, one hundred five and seven thousandths uses 49 letters, whereas it only uses a maximum of 10 digits, if it were written out in its decimal numerical form.

There have been a number of different numeral systems. One of the simplest numeral systems is the unary numeral system, in which every "one" which makes up a number is represented by a symbol. By way of example, if "?" meant "1", then "???" would mean "3", "?" would mean "10" and so on. However, this can be complicated and difficult to interpret when using larger numbers, such as the one you asked about. Tally charts are a common form of a unary system which is still in use today, where for every "one" which makes up a number, you draw "'" or "/", and when you get to a fifth "one" you put a horizontal line through the previous four vertical lines. Please note that tally charts sound much more complicated than they look!

The Roman numeral system of numbers is one of the oldest recorded numeral systems. The system represents the numbers one to 10, and every number greater than 10 is represented by a combination of these symbols. The symbols for the numbers one to ten are I, II, III, IV, V, VI, VII, VIII, IX and X. As you can see, I equals one, and therefore III equals one. V equals five - V with a one (I) preceding it is the equivalent of five minus one, so equals four. On the other hand, V with I succeeding it is the equivalent of five plus one, so equals six.