Properties of the Number 20003

Twenty Thousand Three

Basics

Value: 20002 → 20003 → 20004

Parity: odd

Prime: No

Previous Prime: 19997

Next Prime: 20011

Digit Sum: 5

Digital Root: 5

Palindrome: No

Factorization: 83 × 241

Divisors: 1, 83, 241, 20003

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111000100011

Octal: 47043

Duodecimal: B6AB

Hexadecimal: 4e23

Square: 400120009

Square Root: 141.43196244130957

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

List the positions of all digits '1' in the sequence. This is the lexicographically earliest increasing sequence with this property. A98645

Numbers k such that σ(φ(σ(k))) = φ(σ(φ(k))). A67160

Numbers n with property that n is a substring of its base 5 representation. A38105

Numbers k such that 11k = 6j² + 6j + 1. A106388

a(n) = 2·10ⁿ + 3. A173041

n written in fractional base 4/2. A24630

Composite solutions of the form 4k+3 of the equation (*): σ(φ(σ(x)))=φ(σ(φ(x))). A112017

a(n) is the least semiprime > a(n-1) whose digits do not appear in a(n-1). A131220

Numbers k such that neighboring digits of k²² are distinct. A318763

Lexicographically earliest sequence of distinct positive terms not ending in 0 such that the Levenshtein distance (Ld) between a(n) and a(n+1) is equal to the last digit of a(n). A367810