I'm sorry, is that 22K culture per turn? What mods are you using?
There are defiently some mods at play here. 22K culture a turn, even with culture heavy civs I rarely get 10% of that number before the game is won.
Well I already said I didn't mod this one. I long won before I hit that number of course but even at the point of victory my culture was still easily above 10k. Yes it's possible to hit that high a number you just need very specific conditions all made possible by a fanatical devotion to production, faith and the economy. Unlike others who go for speed I go for all encompassing victories in every area possible and that's only possible with a strong foundation in the industry and the economy. If it helps this was done on Emperor, I doubt the non-aggression route can achieve this on Deity.
1: You need to be Suzerain of most City States in the game and run the Collective Activism Policy Card (+10% Culture per City State you are the Suzerain of.) That also means you need to have meat shields surrounding most of your city state allies because AI is always looking for a chance to capture them.
2: Antananarivo needs to be in the game to give you +2% for every great person you earned, and you need to recruit most of them. For this game I recruited over a 100, partly thanks to Russia's edge in doing so through Lavras, Faith generation, as well as Gold generation and non-stop project works recruiting great people across the board.
3: Enough cities to hold
all the great works and artifacts in the game. (Buy any great work the AI is willing to sell.) This game I only conquered cities who rebelled, so 95% were all founded by me.
4: Kumasi was in this game so I could easily have pushed it way above 20k if I wanted to with 10+ X 2 Culture X Modifiers per trade route. For this instance I had 0 trade routes to City states so Kumasi didn't count but I thought it was worth mentioning.
Doing all those got me to this point:
Huh, there are some numbers here. I think I only got to 200-something with fully upgraded Magnus surrounded by Power Plants and a Ruhr Valley, how do you do that?
I should have hovered over the modifiers:
I didn't know Trade Routes also benefited from production modifiers so about 200 actually came from them. (Mostly for food or else the City can't grow.)
The rest is as follows:
1: 41% from Work Ethics (Religion)
2: 20% from Ruhr Valley (Wonder)
3: 10% from Amundsen-Scott Research Station (Wonder)
4: 15% from Casa de Contratación (Wonder)
5: 10% from Colonial Taxes (Policy Card)
6: 10% from Communism
7: 10% from Amenities
On paper it should be 116% but the +10% from Communism doesn't seem to be working.
Russia gets +1 Production from Tundra, St. Basil's Cathedral gives another + 1, Ruhr Valley gives +1 per mine. This city has at least 16 Workable Hills.
I was Suzerain of 3 Industrial City States with a 30% boost of yields from them thanks to Kilwa Kisiwani.
I also had the benefits of James Watt X2 and Tesla Nikolai X2...not too much of a difference since this city is pretty much standalone.
Unlike Scotland or Australia, these production bonuses are quite permanent. It'd be interesting to see if someone did this with them instead since 100% + 116% could probably yield over 1000 production per turn.