Properties of the Number 20653

Twenty Thousand Six Hundred Fifty-Three

Basics

Value: 20652 → 20653 → 20654

Parity: odd

Prime: No

Previous Prime: 20641

Next Prime: 20663

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 19 × 1087

Divisors: 1, 19, 1087, 20653

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000010101101

Octal: 50255

Duodecimal: BB51

Hexadecimal: 50ad

Square: 426546409

Square Root: 143.71151658792

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

Schoenheim bound L₁(n,6,5). A36833

Denominators of continued fraction convergents to sqrt(379). A41719

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 74 ones. A31842

Integers k such that the k-th triangular number t_k has all its base-12 digits contained in {1,5,7,11}. A118711

Number of (n+3) X 10 0..2 matrices with each 4 X 4 subblock idempotent. A224727

Numbers n such that (n-1)³ + (n+1)³ is a taxi-cab number (A001235). A272910

Denominators in a certain bijection from positive integers to positive rationals. A20653

T(n,k)=Number of (n+3)X(k+3) 0..2 matrices with each 4X4 subblock idempotent. A224728