Properties of the Number 19958

Nineteen Thousand Nine Hundred Fifty-Eight

Basics

Value: 19957 → 19958 → 19959

Parity: even

Prime: No

Previous Prime: 19949

Next Prime: 19961

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 × 17 × 587

Divisors: 1, 2, 17, 34, 587, 1174, 9979, 19958

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100110111110110

Octal: 46766

Duodecimal: B672

Hexadecimal: 4df6

Square: 398321764

Square Root: 141.27278577277366

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Irregular triangle read by rows: T(n,k) is the number of non-isomorphic directed graphs reachable in k >= 0 steps (and no fewer) by n >= 1 agents using the ANY protocol (see A318154). A383386

a(n) = floor(sqrt(a(n-1)² + a(n-2)²)), a(1)=100, a(2)=300. A104908

a(n) = 121·n² - 38·n + 3. A157443

Numerators of continued fraction convergents to sqrt(504). A41962

Number of partitions of n with up to seven distinct kinds of 1. A320694

Triangle read by rows: T(n,k) (0 <= k <= ceiling(n/2)-2) is the number of (1,1) steps starting at level k in all peakless Motzkin paths of length n (can be easily translated into RNA secondary structure terminology). A110238

Numbers k such that 427·2^k+1 is prime. A323114

Consecutive states of the linear congruential pseudo-random number generator (1255·s + 6173) mod 29282 when started at s=1. A385339

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (F(2), F(3), ...). A24472

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Lucas numbers), t = (F(2), F(3), F(4), ...). A25092