2² × 19 × 149 × 1889

Prime Factor Structure

Factorization String 2^2 × 19 × 149 × 1889

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 39,690,000

Proper Divisor Sum 18,298,964

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #21391033 ← → #21391057

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

21,391,036 10,695,518 5,347,759 16,043,278 8,021,639 24,064,918 12,032,459 36,097,378 18,048,689 54,146,068 27,073,034 13,536,517 40,609,552 20,304,776 10,152,388 5,076,194 2,538,097 7,614,292 3,807,146 1,903,573 5,710,720 2,855,360 1,427,680 713,840 356,920 178,460 89,230 44,615 133,846 66,923 200,770 100,385 301,156 150,578 75,289 225,868 112,934 56,467 169,402 84,701 254,104 127,052 63,526 31,763 95,290 47,645 142,936 71,468 35,734 17,867 53,602 26,801 80,404 40,202 20,101 60,304 30,152 15,076 7,538 3,769

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