Properties of the Number 18929

Eighteen Thousand Nine Hundred Twenty-Nine

Basics

Value: 18928 → 18929 → 18930

Parity: odd

Prime: No

Previous Prime: 18919

Next Prime: 18947

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 23 × 823

Divisors: 1, 23, 823, 18929

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100111110001

Octal: 44761

Duodecimal: AB55

Hexadecimal: 49f1

Square: 358307041

Square Root: 137.58270240113762

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

T(j,k) are the numerators s in the representation R = s/t + (2/π)*u/v of the resistance between two nodes separated by the distance vector (j,k) in an infinite square lattice of one-ohm resistors, where T(j,k), j >= 0, 0 <= k <= j, is a triangle read by rows. A355565

G.f. satisfies A(x) = 1 + x·A(x) + x⁶*A(x)⁶. A364523

Numbers k such that k⁴ = x³ + y² has an integer solution. A96741

a(n) = 28·n² + 1. A158556

a(n) = 676·n + 1. A158386

Number of (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| + |y-w| < w+x+y. A213488

a(n) = 24·n² + 52·n + 29. A258721

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 76 ones. A31844

Row sums of A181512. A181513

Left-hand half of triangle A297193. A297194