create table NUMERIC_COLUMN_NAME
(
  JOB VARCHAR2(9),
  10  NUMBER,
  20  NUMBER,
  30  NUMBER,
  60  NUMBER,
  80  NUMBER,
  90  NUMBER,
  100 NUMBER
)
ORA-00904: : invalid identifier

SQL> create table NUMERIC_COLUMN_NAME
  2  (
  3    JOB VARCHAR2(9),
  4    C10  NUMBER,
  5    C20  NUMBER,
  6    C30  NUMBER,
  7    C60  NUMBER,
  8    C80  NUMBER,
  9    C90  NUMBER,
 10    C100 NUMBER
 11  ); 
Table created
 

SQL> drop table  numeric_column_name  ; 
Table dropped
SQL> create table numeric_column_name   as
  2   SELECT *
  3     FROM (SELECT job, deptno, sum(sal) sal
  4             FROM SCOTT.emp
  5            GROUP BY job, deptno) PIVOT(sum(sal) FOR deptno IN(10,
  6                                                               20,
  7                                                               30,
  8                                                               60,
  9                                                               80,
 10                                                               90,
 11                                                               100));
Table created 
SQL> desc  numeric_column_name
Name Type        Nullable Default Comments 
---- ----------- -------- ------- -------- 
JOB  VARCHAR2(9) Y                         
10   NUMBER      Y                         
20   NUMBER      Y                         
30   NUMBER      Y                         
60   NUMBER      Y                         
80   NUMBER      Y                         
90   NUMBER      Y                         
100  NUMBER      Y                          

SQL> create table tst( "10" integer );

Table created.