Properties of the Number 20401

Twenty Thousand Four Hundred One

Basics

Value: 20400 → 20401 → 20402

Parity: odd

Prime: No

Previous Prime: 20399

Next Prime: 20407

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 23 × 887

Divisors: 1, 23, 887, 20401

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111110110001

Octal: 47661

Duodecimal: B981

Hexadecimal: 4fb1

Square: 416200801

Square Root: 142.83206922816737

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 numbers in the n-th antidiagonal of the reciprocity array of 0. A259574

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 361", based on the 5-celled von Neumann neighborhood. A287788

4-Smith numbers. A103125

a(n) = 1250·n² + 100·n + 1. A154375

a(n) = 5000·n² + 200·n + 1. A157511

Numerators of continued fraction convergents to sqrt(102). A41182

Numerators of continued fraction convergents to sqrt(408). A41774

a(n) = 2·prime(n)² - 1. A179262

Boustrophedon transform of sequence 1,1,0,0,0,0,... A756

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