The unique even prime number 2. All other primes are odd primes.
The sequence 2, 4, 6, 10, 14, 22, 26, 34, 38, ... (Sloane's A001747) consisting of the number 2 together with the primes multiplied by 2 is sometimes also called the even primes, since these are the even numbers 
that are divisible by just 1, 2, k, and 
.
Even Number, Odd Prime, Prime Number
Sloane, N. J. A. Sequences A001747 in "The On-Line Encyclopedia of Integer Sequences." http://www.research.att.com/~njas/sequences/.
Wells, D. The Penguin Dictionary of Curious and Interesting Numbers. Middlesex, England: Penguin Books, p. 44, 1986.