SQL & PL/SQL

This is giving me a headache! I can't seem to spool any csv files where the number field length is greater than 11 digits. For example 1.23832E+11 should actually be 123831961495

Is there anything that can be changed in the below that will prevent scientific notation?

COLUMN dcol new_value mydate noprint

Alter session set nls_date_format='dd/mm/yyyy hh24:mi:ss';

column normalised_event_id format '99999999999999999';

column charge_id format '99999999999999999';

SELECT to_char(sysdate+1,'YYYYMMDD') dcol FROM dual;

spool \\three\departments\rabillsourcecode\RA_Dropzone\Data_Cap_Usage_&mydate..csv;

set linesize 10000;

set pagesize 0;

set colsep ,;

set trimout on;

set trimspool on;

set term off;

set numw 14;

SET NEWPAGE NONE;

Thanks for any help you can provide!