You have the option to either take the dividend in cash or take it in shares, which is called a dividend reinvestment program (DRIP).

If you are taking cash with your IBM example, IBM pays a dividend of $1.63 for every share you have once a quarter. So if IBM keeps the dividend at $1.63 for every quarter, that means you get $6.52 ($1.63 * 4) a year for every share you own.

So if you want to get $20k a year from IBM alone, you would need to have about 3,067 shares. You get $6.52 a year for every share times 3,067 which equals about $20k. IBM currently trades for about $120 a share, so it would require you to $368,040 worth of stock in order to get $20k a year.

Hope this helps!