Properties of the Number 20742

Twenty Thousand Seven Hundred Forty-Two

Basics

Value: 20741 → 20742 → 20743

Parity: even

Prime: No

Previous Prime: 20731

Next Prime: 20743

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 3457

Divisors: 1, 2, 3, 6, 3457, 6914, 10371, 20742

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000100000110

Octal: 50406

Duodecimal: 10006

Hexadecimal: 5106

Square: 430230564

Square Root: 144.02083182651043

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

a(n) is the number of terms in row n of the array A378303. A378307

Number of solutions to the Xqueens problem on an n X n board. A350611

Numbers k such that 57·2^k + 1 is prime. A2274

Number of UUU's in all skew Dyck paths of semilength n. A128721

a(n) = 36·n² + 6. A158479

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 48. A31726

Triangle of numbers of walks in the quarter-plane, of length 2n beginning and ending at the origin using steps {(1,1), (1,0), (-1,0), (-1,-1)} (Gessel steps) arranged according to the number of times the steps (1,1) and (-1,-1) occur. A157513

Pisot sequence T(7,9). A20742