Eighteen

[rbandrews]

The number 1818 is a number, 18, repeated twice.

If you add together the digits, 1+8+1+8, you also get 18.

There is no other number with this property.

Comments

[rbandrews]

In hexadecimal, 1E1E works.

[rbandrews]

Yeah, you're right, I want to total 14, not have the second digit be 14. My mistake.