Question what power supply should i get

Jan 26, 2021
I'm building a pc with amd ryzen 9 3950x, a MSI MEG X570 ace, a Nvidia rtx 2060, a 7.2k rpm sata 2tb hdd, a sata 3 ssd with 480 gb accessories are a mic, a gaming mouse, and a gaming keyboard. it will have 18 120mm fans, what should my power supply be?
Note I'm hoping to add 3 m.2 ssds prob at least 1 tb each in the future