18,611,618

2 × 9305809

18,611,618 factors as 2 × 9305809. Its 4 positive divisors give a proper-divisor sum of 9,305,812, so this integer is deficient. The Collatz stopping time is 89 steps.

Prime Factor Structure

Factorization String 2 × 9305809

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 27,917,430

Proper Divisor Sum 9,305,812

Digit Sum / Digital Root 32 (Root: 5)

Adjacent Primes #18611611 ← → #18611627

Radix Representation

Decimal	18611618
Binary	1000110111111110110100010 (25 bits)
Octal	0o106776642
Hexadecimal	0x11BFDA2

Divisor Catalog (4)

1 2 9,305,809 18,611,618

Collatz Trajectory (89 steps to reach 1)

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

18,611,618 9,305,809 27,917,428 13,958,714 6,979,357 20,938,072 10,469,036 5,234,518 2,617,259 7,851,778 3,925,889 11,777,668 5,888,834 2,944,417 8,833,252 4,416,626 2,208,313 6,624,940 3,312,470 1,656,235 4,968,706 2,484,353 7,453,060 3,726,530 1,863,265 5,589,796 2,794,898 1,397,449 4,192,348 2,096,174 1,048,087 3,144,262 1,572,131 4,716,394 2,358,197 7,074,592 3,537,296 1,768,648 884,324 442,162 221,081 663,244 331,622 165,811 497,434 248,717 746,152 373,076 186,538 93,269 279,808 139,904 69,952 34,976 17,488 8,744 4,372 2,186 1,093 3,280

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