Playing with numbers and their properties 📓 ✏️ 💮 (credit - http://www.numbergossip.com/)
- abundant
- amicable
- apocalyptic power
- aspiring
- automorphic
- cake
- Carmichael
- Catalan
- composite
- compositorial
- cube
- deficient
- even
- evil
- factorial
- Fibonacci
- happy
- hungry
- lazy caterer
- lucky
- Mersenne
- Mersenne prime
- narcissistic
- odd
- odious
- palindrome
- palindromic prime
- pentagonal
- perfect
- power of 2
- powerful
- practical
- prime
- primorial
- pronic
- repunit
- Smith
- sociable
- square
- square-free
- tetrahedral
- triangular
- twin
- Ulam
- undulating
- untouchable
- vampire
- weird