Number tools
Each tool runs in your browser. Nothing you type is stored.
Number decoderPrime factorisation, divisors, σ, φ, bases 2–36, words, Roman numerals, square and Fibonacci checks, neighbours.Up to 15 digits
ZIP & postal explorerPlace, region and coordinates with a map; straight-line distance between two codes.US, CA, GB, IN, DE…
Lucky-number readerCultural luck score, memorability score, digit-by-digit associations.Phones, plates, prices
Domain scorecardLiquidity score and tier for numeric and word domains with every factor shown.36118.com