20,009,405

5 × 13 × 43 × 7159

Prime Factor Structure

Factorization String 5 × 13 × 43 × 7159

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 26,463,360

Proper Divisor Sum 6,453,955

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #20009393 ← → #20009411

1 5 13 43 65 215 559 2,795 7,159 35,795 93,067 307,837 465,335 1,539,185 4,001,881 20,009,405

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

20,009,405 60,028,216 30,014,108 15,007,054 7,503,527 22,510,582 11,255,291 33,765,874 16,882,937 50,648,812 25,324,406 12,662,203 37,986,610 18,993,305 56,979,916 28,489,958 14,244,979 42,734,938 21,367,469 64,102,408 32,051,204 16,025,602 8,012,801 24,038,404 12,019,202 6,009,601 18,028,804 9,014,402 4,507,201 13,521,604 6,760,802 3,380,401 10,141,204 5,070,602 2,535,301 7,605,904 3,802,952 1,901,476 950,738 475,369 1,426,108 713,054 356,527 1,069,582 534,791 1,604,374 802,187 2,406,562 1,203,281 3,609,844 1,804,922 902,461 2,707,384 1,353,692 676,846 338,423 1,015,270 507,635 1,522,906 761,453

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