In the command prompt, this will work (where ⎵ denotes a space):

• load⎵#15133
• load⎵"#15133"
• load("#15133")
• ⎵load("#15133")
• ⎵load⎵("#15133")

However this will throw syntax errors:

• load⎵⎵#15133
• ⎵load⎵#15133
• load⎵⎵"#15133"
• load⎵("#15133")