Properties of the Number 18943

Eighteen Thousand Nine Hundred Forty-Three

Basics

Value: 18942 → 18943 → 18944

Parity: odd

Prime: No

Previous Prime: 18919

Next Prime: 18947

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 19 × 997

Divisors: 1, 19, 997, 18943

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100111111111

Octal: 44777

Duodecimal: AB67

Hexadecimal: 49ff

Square: 358837249

Square Root: 137.63357148602952

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

Sum of smallest parts of all partitions of n. A46746

Composite numbers whose divisors (except 1) all contain the digit 9. A62680

Björner-Welker sequence: 2ⁿ*(n² + n + 2) - 1. A55580

A sequence of asymptotic density ζ(10) - 1, where ζ is the Riemann ζ function. A143036

Centered 22-gonal numbers. A69173

Triangle of coefficients of polynomials u(n,x) jointly generated with A210198; see the Formula section. A210197

a(n) = ∑_{k=0..floor((n-1)/2)} binomial(n,k)*binomial(n-1-k,floor((n-1)/2) - k). A359066

Number of singular n X n rational {0,1}-matrices with no zero rows or columns. A116507

Zero followed by partial sums of A008865. A145067

Expansion of 1/((1-2·x)⁵*(1-x)). A211386