This question is somewhat vague and hard to answer. If you are looking for an up conversion then 2000000 kilobytes is 1953.125 megabytes or 1.90734863 gigabytes. In other terms this data would fit on 3 CDs or 1 DVD.
Keep in mind that kb can mean Kb or KB which is kilobits and kilobytes respectively. In this answer I have worked with kilobytes because it is a more common representation.
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Normally, 1 MB = 1000 kB, and 1 MiB = 1024 kiB. However, many people use kB instead of kiB, as the binary-type prefixes (kibi-, mebi-, gibi- etc.) aren't universally used.
So 2,000,000kB is 2,000MB, or 2GB :)