Properties of the Number 21494

Twenty-One Thousand Four Hundred Ninety-Four

Basics

Value: 21493 → 21494 → 21495

Parity: even

Prime: No

Previous Prime: 21493

Next Prime: 21499

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 11 × 977

Divisors: 1, 2, 11, 22, 977, 1954, 10747, 21494

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001111110110

Octal: 51766

Duodecimal: 10532

Hexadecimal: 53f6

Square: 461992036

Square Root: 146.60832172833847

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

Numbers k such that k, k+1, k+2 and k+3 have the same number of divisors. A6601

Numbers k such that k through k+4 all have the same number of divisors. A49051

T(n,k)=Number of nXk 0..1 arrays with each 1 adjacent to 2, 3 or 4 king-move neighboring 1s. A296827

Upper Beatty array of the golden ratio, (1+sqrt(5))/2. A181661

Maximum total Hamming distance between pairs of consecutive elements in any permutation of all 2ⁿ binary words of length n. A271771

Number of n X 2 0..1 arrays with each 1 adjacent to 2, 3 or 4 king-move neighboring 1s. A296821

Numbers k such that k and k-1 both first appear in the same power of 2 (in base 10). A322919

Consecutive states of the linear congruential pseudo-random number generator (1291·s + 4621) mod 21870 when started at s=1. A385337

Numbers n such that 117·2ⁿ-1 is prime. A50584

Numbers k such that the sum of the digits of k^σ(k) is divisible by k. A109658