Properties of the Number -21398

Twenty-One Thousand Three Hundred Ninety-Eight

Basics

Value: -21399 → -21398 → -21397

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 13 × 823

Divisors: 1, 2, 13, 26, 823, 1646, 10699, 21398

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001110010110

Octal: -51626

Duodecimal: -10472

Hexadecimal: -5396

Square: 457874404

Square Root: 146.2805523642839

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

Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w²>x²+y². A211810

a(n) is the number of distinct five-cuboid combinations filling an n X n X n cube only with at least one cut spanning through the full cube. A384737

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011. A259720

Sum of primes between 100·n and 100·n + 99. A276355

Convolution of Lucas numbers and A000201. A23621

Inverse binomial transform of A064413. A65972

a(1)=1, a(n) is the smallest integer > a(n-1) such that the largest element in the simple continued fraction for S(n)=1/a(1)+1/a(2)+...+1/a(n) equals prime(n). A70901