Module:NumberFormater

Abbreviation	Name	Value	Equivalent
K	Thousand or Kilodillion	10^3
M	Million	10^6
B	Billion	10^9
T	Trillion	10^12
Qa	Quadrillion	10^15
Qi	Quintillion	10^18
Sx	Sextillion	10^21
Sp	Septillion	10^24
O	Octillion	10^27
No	Nonillion	10^30
D	Decillion	10^33
Udc	Undecillion	10^36
Dd	Duodecillion	10^39
Tdc	Tredecillion	10^42
Qt	Quattuordecillion	10^45
Qd	Quindecillion	10^48
Sd	Sexdecillion	10^51
St	Septendecillion	10^54
Od	Octodecillion	10^57
Nm	Novemdecillion	10^60
Vg	Vigintillion	10^63
Uvg	Unvigintillion	10^66
Dvg	Duovigintillion	10^69
Tvg	Tresvigintillion or Trevigintillion	10^72
Qav	Quattuorvigintillion	10^75
Qvg	Quinvigintillion	10^78
Svg	Sexvigintillion or Sesvigintillion	10^81
Spv	Septemvigintillion or Septenvigintillion	10^84
Ovg	Octovigintillion	10^87
Nvg	Novemvigintillion or Novenvigintillion	10^90
Tg	Trigintillion	10^93
Ut	Untrigintillion	10^96
Dt	Duotrigintillion	10^99
Reamining will follow e# notation.

* Sources from an external Github site.

---

local p = {}
local UNIT_EXPONENTS = {
    'K',
    'M',
    'B',
    'T',
    'Q',
    'QQ',
    'S',
    'SP',
    'O',
    'N',
    'D'
}

function p.main(frame)
	local numstr = frame.args[1]
	if numstr == "Lots" then
		return numstr
	end
	if tonumber(numstr) == nil then
		return "<BAD NUMBER>"
	end
	return p.formatnumber(numstr)
end

function p.formatnumber(arg)
	-- how many digts are after the first digit divided by 3.
	local unit = math.floor(arg:len() - 1 / 3)
	if unit == 0 then
		return arg
	end
	
	local n = string.format("%.1f", tonumber(arg) / math.pow(10, unit*3))
	
    return string.format("%s %s", n,  UNIT_EXPONENTS[unit])
end

function p.formatwithseperator(arg)
	local ret = ''
	
	-- Iterate from the end and add in commas.
	while arg:len() > 3 do
		ret = "," .. arg:sub(-3) .. ret
		arg = arg:sub(1, -3)
	end
	-- Prepend remaining digits.
	ret = arg .. ret
	
	return ret
end

return p