Properties of the Number 20649

Twenty Thousand Six Hundred Forty-Nine

Basics

Value: 20648 → 20649 → 20650

Parity: odd

Prime: No

Previous Prime: 20641

Next Prime: 20663

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 6883

Divisors: 1, 3, 6883, 20649

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000010101001

Octal: 50251

Duodecimal: BB49

Hexadecimal: 50a9

Square: 426381201

Square Root: 143.6975991448709

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

List of codewords in binary lexicode with Hamming distance 6 written as decimal numbers. A75934

Numbers k such that there are exactly four biquadratefree powerful numbers (A338325) between k² and (k+1)². A338391

Degree of denominator of GF for number of ways to place k nonattacking queens on an n X n board. A178717

Numbers k such that the sum of iterations of the alternating sum of divisors function A071324 starting from k is equal to 2·k. A333263

Least quadratic nonresidue modulo n (with n >= 3). A20649