title: How do I suppress scientific notation in pandas DF when exporting to an excel file?
body: <p>I need to export a Data Frame to an excel file with big natural numbers without decimals like 1234567890123456789 by example, and the output in the excel file should be a number (not a string).</p>
  <p>I have found a lot of solutions to suppress scientific notation, but those solutions are using a string instead of a number, or you need to use a number with decimals like 0.00001 by example (and I need to use just natural numbers, not decimals).</p>
  <p>There is any way to do what I need?</p>
  <p>Just in case, here is how I manage the data:</p>
  <pre><code># Reading:
  excel_file = pd.ExcelFile(filename_in)
  # I read some data frames like this:
  df = pd.read_excel(excel_file, sheet)
  # I perform operations with the data frames
  
  # Exporting to excel (.xlsx):
  excel_writer = pd.ExcelWriter(filename_out, engine='xlsxwriter')
  
  # I do this with all the data frames:
  df.to_excel(excel_writer, sheet_name=sheet, index=False)
  
  # After all the changes:
  excel_writer.save()
  </code></pre>