How many satoshi are in 1 BTC?

Could you possibly enlighten me on a fundamental aspect of the cryptocurrency world? I'm trying to wrap my head around the concept of satoshi and how they relate to Bitcoin. I've been told that satoshi are a subunit of Bitcoin, but I'm not quite sure how to visualize their quantity in relation to 1 BTC. Could you please explain to me how many satoshi there are in 1 Bitcoin? I'm really curious to know the exact number. Thank you so much for your help in clarifying this matter for me!