Properties of the Number 19922

Nineteen Thousand Nine Hundred Twenty-Two

Basics

Value: 19921 → 19922 → 19923

Parity: even

Prime: No

Previous Prime: 19919

Next Prime: 19927

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 7 × 1423

Divisors: 1, 2, 7, 14, 1423, 2846, 9961, 19922

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100110111010010

Octal: 46722

Duodecimal: B642

Hexadecimal: 4dd2

Square: 396886084

Square Root: 141.14531518970085

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 1..2 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1. A171276

Numbers k such that the total number of digits d in the numbers from 1 to k is even for each d from 0 to 9. A380642

a(n) = 7ⁿ+5ⁿ-2n. A121201

Expansion of 1/((1-2·x)*(1-3·x+3·x²)*(1-4·x+6·x²-4·x³)). A201458

Number of 0..n arrays of length 4 with 0 never adjacent to n. A212837

Triangle read by rows: numerators of coefficients (highest degree first) of polynomials interpolating Fibonacci numbers. A322044

Numbers k such that 435·2^k+1 is prime. A323146

a(n) = 2ⁿ*∏_{k=1..floor((n-1)/2)} (1 + 2·cos(k*π/n)² + 4·cos(k*π/n)⁴). A152103

Number of 1..n integer arrays v[1..16] of length 16 with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..15. A171353

Numbers k such that (31·10^k - 1)/3 is prime. A283112