# What is a Voluminous Number™?

In the spirit of the What is a Word™/Phrase™ series started by JLee, a special brand of Phrase™ and Word™ puzzles.

If a number conforms to a special rule, I call it a Voluminous Number™.
Use the examples below to find the rule.

$$% set Title text. (spaces around the text ARE important; do not remove.) % increase Pad value only if your entries are longer than the title bar. % \def\Pad{\P{0.0}} \def\Title{\textbf{ Voluminous }} % \def\S#1#2{\Space{#1}{20px}{#2px}}\def\P#1{\V{#1em}}\ \def\V#1{\S{#1}{9}} \def\T{\Title\textbf{Numbers }^™\Pad}\def\NT{\Pad\textbf{Not}\T\ }\displaystyle \smash{\lower{29px}\bbox[yellow]{\phantom{\rlap{rubio.2017.02.04}\S{6px}{0} \begin{array}{cc}\Pad\T&\NT\\\end{array}}}}\atop\def\V#1{\S{#1}{5}} \begin{array}{|c|c|}\hline\Pad\T&\NT\\\hline % \text{ 62 }&\text{ 22 }\\ \hline \text{ 18 }&\text{ 35 }\\ \hline \text{ 42 }&\text{ 97 }\\ \hline \text{ 25 }&\text{ 70 }\\ \hline \text{ 76 }&\text{ 45 }\\ \hline \text{ 31 }&\text{ 17 }\\ \hline \end{array}$$

And, if you want to analyze, here is a CSV version:

Voluminous Numbers™,Not Voluminous Numbers™
62,22
18,35
42,97
25,70
76,45
31,17


The puzzle satisfies the series' inbuilt assumption, that each number can be tested for whether it is a Voluminous Number™ without relying on the other numbers.

What is the special rule these numbers conform to?

• nice. but rot13(vfa'g n 1 abeznyyl evtug whfgvsvrq ba n qvtvgny 7 frtzrag sbag)? Sep 9 '18 at 0:46
• @SteveV rot13(Nynf, lbh ner evtug! V nffhzrq yrsg nyvtazrag, jubbcf!) Sep 9 '18 at 0:50