1,000 Kb is 1 Mb, so 21,000,000 Kb is 210 Mb. Barely enough to run an operating system. If you see this number on any of your drives as spare space, it's time to add another one.
One MB (megabyte) is equal to 1,024 kB (kilobytes).
1 MB= 1024 KB 20 MB = 20480 Kb
Nominally, 1 MB = 1,000 KB, and 1 KB = 0.001 MB.
40960 KB in 40 MB
523 kB = 0.532 MB (Megabytes)
2060 MB is 2,109,440 KB
2,003 MB is 2,051,072 KB
20,662 Kb is 20.18 Mb
320 KB is 0.3125 MB
There are 1024 kb in a Mb so that would be 918.45 kb
125 MB equals 128,000 KB
1 mb=1024 kb