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Properties of the Number 20503

Twenty Thousand Five Hundred Three

Basics

Value: 20502 → 20503 → 20504

Parity: odd

Prime: No

Previous Prime: 20483

Next Prime: 20507

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 7 × 29 × 101

Divisors: 1, 7, 29, 101, 203, 707, 2929, 20503

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 101000000010111

Octal: 50027

Duodecimal: BA47

Hexadecimal: 5017

Square: 420373009

Square Root: 143.1886867039432

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

a(n) = smallest number k such that ∏i=1..k prime(i)/(prime(i)-1) > n. A5579
Prime time numbers on 6-digit clocks: numbers of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60. A295014
The sequence denoted by hn used in the calculation of A323260. A323269
Triangular numbers with sum of digits = 10. A68129
Triangular numbers which are sums of three consecutive primes. A167788
Number of intersection points of diagonals of an n-gon in general position, plus number of vertices. A14626
Let b(n) = ∏i=1..n pi/(pi - 1), pi = i-th prime; a(n) = minimum k such that b(k) >= n. A256968
a(n+1) = a(n) + floor(a(n)/5) with a(0)=5. A182306
Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 457", based on the 5-celled von Neumann neighborhood. A282362
Denominators of continued fraction convergents to sqrt(774). A42493