The number 2 is the second natural number, situated after 1 and before 3. It is the smallest and only even prime number. Key facts about the number 2:
Mathematics: It is the first Ramanujan prime, first superior highly composite number, and first colossally abundant number.
Base-10: Any number ending in 0, 2, 4, 6, or 8 is divisible by 2.
Binary: In binary (base-2), the number 2 is represented as 10₂, consisting of two digits (0 and 1). Word: Written in English, the number is spelled “Two”.
You can watch this video to learn how to write the number 2: