2² × 5² × 13 × 109 × 151

Prime Factor Structure

Factorization String 2^2 × 5^2 × 13 × 109 × 151

Distinct Prime Factors 5

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 72

Divisor Sum (σ) 50,795,360

Proper Divisor Sum 29,398,660

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #21396691 ← → #21396701

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

21,396,700 10,698,350 5,349,175 16,047,526 8,023,763 24,071,290 12,035,645 36,106,936 18,053,468 9,026,734 4,513,367 13,540,102 6,770,051 20,310,154 10,155,077 30,465,232 15,232,616 7,616,308 3,808,154 1,904,077 5,712,232 2,856,116 1,428,058 714,029 2,142,088 1,071,044 535,522 267,761 803,284 401,642 200,821 602,464 301,232 150,616 75,308 37,654 18,827 56,482 28,241 84,724 42,362 21,181 63,544 31,772 15,886 7,943 23,830 11,915 35,746 17,873 53,620 26,810 13,405 40,216 20,108 10,054 5,027 15,082 7,541 22,624

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