Convert currency to words

example: getTotalInWords(5123)


outPut: five thousand one hundred and twenty-three

getTotalInWords(number) {
    const first = ['', 'one ', 'two ', 'three ','four ', 'five ','six ','seven ','eight ','nine ','ten ','eleven ','twelve ',
      'thirteen ','fourteen ','fifteen ','sixteen ','seventeen ','eighteen ','nineteen '];
    const tens = ['', '', 'twenty','thirty','forty','fifty', 'sixty','seventy','eighty','ninety'];
    const mad = ['', 'thousand', 'million', 'billion', 'trillion'];
    let word = '';
 
    for (let i = 0; i < mad.length; i++) {
      let tempNumber = number%(100*Math.pow(1000,i));
      if (Math.floor(tempNumber/Math.pow(1000,i)) !== 0) {
        if (Math.floor(tempNumber/Math.pow(1000,i)) < 20) {
          word = first[Math.floor(tempNumber/Math.pow(1000,i))] + mad[i] + ' ' + word;
        } else {
          word = tens[Math.floor(tempNumber/(10*Math.pow(1000,i)))] + '-' + first[Math.floor(tempNumber/Math.pow(1000,i))%10] + mad[i] + ' ' + word;
        }
      }
 
      tempNumber = number%(Math.pow(1000,i+1));
      if (Math.floor(tempNumber/(100*Math.pow(1000,i))) !== 0) {
        word = first[Math.floor(tempNumber/(100*Math.pow(1000,i)))] + 'hunderd ' + word;
      }
    }
    return word;
  }