How to check oracle database is either 32 bit or 64bit

SQL> conn / as sysdba
Connected.
SQL>  select length(addr)*4 || '-bits' word_length from v$process where rownum=1;

WORD_LENGTH
---------------------------------------------
64-bits

SQL>

-- using cmd in Windows machine

C:\Users\rajam>sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Oct 30 17:36:27 2019

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production

SQL>
SQL> select length(addr)*4 || '-bits' word_length from v$process where rownum=1;

WORD_LENGTH
---------------------------------------------
32-bits

SQL>