Properties of the Number 18995

Eighteen Thousand Nine Hundred Ninety-Five

Basics

Value: 18994 → 18995 → 18996

Parity: odd

Prime: No

Previous Prime: 18979

Next Prime: 19001

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 5 × 29 × 131

Divisors: 1, 5, 29, 131, 145, 655, 3799, 18995

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101000110011

Octal: 45063

Duodecimal: ABAB

Hexadecimal: 4a33

Square: 360810025

Square Root: 137.82234942127494

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

Values of n such that L(20) and N(20) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227523

Numbers k such that 5^k + 2 is a prime. A87885

Numbers k such that 2^k == 18 (mod k). A128126

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays colored with the sets of distinct values in every 2 X 2 subblock, with new values 0..3 introduced row-major order. A236262

Indices of primes in the 7th-order Fibonacci number sequence, A060455. A253318

T(n,k)=Number of (n+2)X(k+2) arrays of permutations of 0..(n+2)*(k+2)-1 with each element moved 0 or 1 knight moves and equal numbers of elements advancing and retreating in the array numbered in row major order. A263706

Number of 2 X 2 matrices with all elements in {0,...,n} and prime permanent. A281090

Solution of the complementary equation a(n) = 2·a(n-1) - a(n-2) + b(n-1) -1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences. A294867

Solution of the complementary equation a(n) = 4·a(n-2) + b(n-2), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4, and (a(n)) and (b(n)) are increasing complementary sequences. A295062

Number of independent sets of nodes in C₄ X C_n (n > 2). A50402