------
## 最终结论
```python
def even_bit_toggle_number(n):
    # Create a mask for odd bits (0b010101010101...)
    mask = 0xAAAAAAAA
    # Toggle the odd bits using XOR operation
    return n ^ mask

# Test cases
assert even_bit_toggle_number(10) == 15
assert even_bit_toggle_number(20) == 1
assert even_bit_toggle_number(30) == 11
```