title: How to find nearest bigger 2**n value to a value?
body: <p>My goal is to get nearest bigger number than an input integer that is two to the n.</p>
  
  <p>For example, what should <code>nearestbigger</code> be?</p>
  
  <pre><code>integerinput = [2016, 300, 9001]
  for x in integerinput:
      print(nearestbigger(x))
  </code></pre>
  
  <p>Expected Output</p>
  
  <pre><code>2048
  512
  16384
  </code></pre>