Digit-Related Numbers
- 0-Free
- Abundant Number
- Additive Persistence
- Alladi-Grinstead Constant
- Almost Perfect Number
- Amenable Number
- Amicable Triple
- Apocalypse Number
- Apocalyptic Number
- Armstrong Number
- Augmented Amicable Pair
- Automorphic Number
- Barbier Infinite Word
- Baxter-Hickerson Function
- Bit Length
- Concatenated Number Sequence
- Concatenation Sequence
- Consecutive Number Sequences
- Deficient Number
- Digit
- Digit Block
- Digit Count
- Digit Product
- Digit Sum
- Digitaddition
- Digitaddition Generator
- Digital Root
- Equidigital Number
- Evil Number
- Factorion
- Gelfand's Question
- Happy Number
- Harshad Number
- Hoax Number
- Kaprekar's Constant
- Kaprekar Number
- Kaprekar Routine
- Kaprekar Sequence
- Katadrome
- Keith Number
- Langford's Problem
- Least Significant Bit
- Legion's Numbers
- Metadrome
- Multiplicative Digital Root
- Multiplicative Persistence
- Münchausen Number
- Münchhausen Number
- Narcissistic Number
- Odious Number
- Pandigital
- Pandigital Fraction
- Pandigital Number
- Persistent Number
- Prime-Counting Concatenation Constant
- Rational Amicable Pair
- RATS Sequence
- Recurring Digital Invariant
- Repdigit
- Repfigit Number
- Repunit
- Repunit Prime
- Reversal
- Reverse-Then-Add Sequence
- Revrepfigit Number
- Rhonda Number
- Rudin-Shapiro Sequence
- Sad Number
- Saunders Graphic
- Self-Descriptive Number
- Self Number
- Smarandache Number
- Smarandache Prime
- Smarandache-Wellin Number
- Smarandache-Wellin Prime
- Smith Brothers
- Smith Number
- Sort-Then-Add Sequence
- Sum-Product Number
- Super-d Number
- Tetradic Number
- Trimorphic Number
- Undulating Number
- Unhappy Number
- Vampire Number
- Visual Representation Number
- VR Number
- Wallis's Problem
- Wasteful Number
- Zerofree