How many $20 bills are in a bundle?

I'm curious to know, how many $20 bills make up a standard bundle? Is there a specific number of these bills that are bundled together, or does it vary depending on the institution or context? Understanding the makeup of a bundle is important for those working in finance, especially in the cryptocurrency field where we often deal with large sums of money. So, I'm hoping you can shed some light on this for me.