how to go to column by its number in sublime text 3

Solution 1:

Just press ctrl+p (cmd+p on mac) to bring on "Goto Anything" palette, and then type colon, line number, colon, column number:

:24:13

You can also type filename first, and Sublime will move you straight to place in that file you need.

styles/main.css:24:13

Solution 2:

Have a look at the GotoRowCol plugin, which lets you specify a row and column to go to.

For this plugin to be useful, you should really consider making a custom keyboard shortcut to execute it – it's covered in the readme.