@extra-number/significant-digits (npm): Counts the number of significant digits of a number.
Keywords: extra|number|significant|digits|significantDigits|aliquot-sum|arithmetic-mean|binomial|ceil|ceil-div|compare|constrain|cubic-mean|degrees|factorial|floor|floor-div|from-roman-numerals|gcd|geometric-mean|harmonic-mean|is|is-pow