Properties of the Number 21348

Twenty-One Thousand Three Hundred Forty-Eight

Basics

Value: 21347 → 21348 → 21349

Parity: even

Prime: No

Previous Prime: 21347

Next Prime: 21377

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 593

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 36, 593

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001101100100

Octal: 51544

Duodecimal: 10430

Hexadecimal: 5364

Square: 455737104

Square Root: 146.10954794263105

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

Small-number statistic from the enumeration of domino tilings of a 7-pillow of order n. A112841

Numbers that are the sum of eight fourth powers in nine or more ways. A345584

Numbers that are the sum of eight fourth powers in ten or more ways. A345585

T(n,k)=Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-k-1. A211963

Numbers k such that k+1 is composite and divides 3^k-2^k. A68410

Numbers n representable as x·y + x + y, where x >= y > 1, such that all x's and y's in all representation(s) of n are perfect squares. A258366

Decimal expansion of 1/344. A21348