Pick the most universal number:
You could say “0” because everything starts from the zero ground-state. You could say “1” because one is the fundamental unit of every other number (dividing or multiplying by one yields the same result; every integer is constituted of ones). You could say “2” because everything in the world is posited on dynamic opposition, the yin-yang of existence, without which nothing is.
But I think the most universal number is 3. Here is my reasoning.
Three is the base of all numbers (i.e. all multiples of three) that embody the principle of self-replication. Therefore it replicates itself into a universe and if it didn’t there would be no universe. So it’s the universal number.
Zero is not self-replicating. It ain’t even there. One does not replicate itself. One is one and all alone and evermore shall be so. Two does not replicate. Now there you might argue. But just because A and B get together and interact and cause C to emerge, whether C be an idea, an emotion, a new widget, or a human being, twoness is a state of division. It represents a transitional state. Three, which incorporates the fruit and materialization of the interaction, represents a new wholeness which rolls over easily into a new replication.
Note how the three-based rhythm creates a feeling of universal ongoingness. I am speaking of the waltz, as in 2001: A Space Odyssey, when the camera pans down the length of a huge space station while the Blue Danube plays gloriously on the soundtrack.
Noah's ark was a two-by-two affair. The ark of this universe is a three-by-three vehicle. All aboard!