=====================================
decimal
=====================================

1234567890
-1234567890
1_234_567_890
019

---

(source
  (integer)
  (unary_operator
    (integer))
  (integer)
  (integer))

=====================================
binary
=====================================

0b0101011
-0b0101011
0b0_10_10_11

---

(source
  (integer)
  (unary_operator
    (integer))
  (integer))

=====================================
octal
=====================================

0o1234567
-0o1234567
0o1_23_45_67

---

(source
  (integer)
  (unary_operator
    (integer))
  (integer))

=====================================
hexadecimal
=====================================

0x123456789abcdefABCDEF
-0x123456789abcdefABCDEF
0x123456789_abcdef_ABCDEF

---

(source
  (integer)
  (unary_operator
    (integer))
  (integer))