title: convert large number to spoken english
body: <p>Converting 'small' numbers to English is not to troublesome. But if you handle BCMath Arbitrary Precision numbers then it can be.</p>
  
  <p>Using code from:</p>
  
  <p><a href="http://marc.info/?l=php-general&amp;m=99928281523866&amp;w=2" rel="nofollow">http://marc.info/?l=php-general&amp;m=99928281523866&amp;w=2</a></p>
  
  <p>The maximum number seems to be:</p>
  
  <blockquote>
    <p>two billion one hundred forty seven
    million four hundred eighty three
    thousand six hundred forty seven</p>
  </blockquote>
  
  <p>Anyone know a function to convert numbers bigger than that?</p>