18,275,621

7 × 13 × 47 × 4273

18,275,621 factors as 7 × 13 × 47 × 4273. Its 16 positive divisors give a proper-divisor sum of 4,701,403, so this integer is deficient. The Collatz stopping time is 169 steps.

Prime Factor Structure

Factorization String 7 × 13 × 47 × 4273

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 22,977,024

Proper Divisor Sum 4,701,403

Digit Sum / Digital Root 32 (Root: 5)

Adjacent Primes #18275573 ← → #18275633

Radix Representation

Decimal	18275621
Binary	1000101101101110100100101 (25 bits)
Octal	0o105556445
Hexadecimal	0x116DD25

Divisor Catalog (16)

1 7 13 47 91 329 611 4,273 4,277 29,911 55,549 200,831 388,843 1,405,817 2,610,803 18,275,621

Collatz Trajectory (169 steps to reach 1)

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

18,275,621 54,826,864 27,413,432 13,706,716 6,853,358 3,426,679 10,280,038 5,140,019 15,420,058 7,710,029 23,130,088 11,565,044 5,782,522 2,891,261 8,673,784 4,336,892 2,168,446 1,084,223 3,252,670 1,626,335 4,879,006 2,439,503 7,318,510 3,659,255 10,977,766 5,488,883 16,466,650 8,233,325 24,699,976 12,349,988 6,174,994 3,087,497 9,262,492 4,631,246 2,315,623 6,946,870 3,473,435 10,420,306 5,210,153 15,630,460 7,815,230 3,907,615 11,722,846 5,861,423 17,584,270 8,792,135 26,376,406 13,188,203 39,564,610 19,782,305 59,346,916 29,673,458 14,836,729 44,510,188 22,255,094 11,127,547 33,382,642 16,691,321 50,073,964 25,036,982

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