3² × 7² × 43

Prime Factor Structure

Factorization String 3^2 × 7^2 × 43

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 32,604

Proper Divisor Sum 13,641

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #18959 ← → #18973

1 3 7 9 21 43 49 63 129 147 301 387 441 903 2,107 2,709 6,321 18,963

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

18,963 56,890 28,445 85,336 42,668 21,334 10,667 32,002 16,001 48,004 24,002 12,001 36,004 18,002 9,001 27,004 13,502 6,751 20,254 10,127 30,382 15,191 45,574 22,787 68,362 34,181 102,544 51,272 25,636 12,818 6,409 19,228 9,614 4,807 14,422 7,211 21,634 10,817 32,452 16,226 8,113 24,340 12,170 6,085 18,256 9,128 4,564 2,282 1,141 3,424 1,712 856 428 214 107 322 161 484 242 121

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.