Properties of the Number 19992

Nineteen Thousand Nine Hundred Ninety-Two

Basics

Value: 19991 → 19992 → 19993

Parity: even

Prime: No

Previous Prime: 19991

Next Prime: 19993

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 7 ² × 17

Divisors: 1, 2, 3, 4, 6, 7, 8, 12, 14, 17

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111000011000

Octal: 47030

Duodecimal: B6A0

Hexadecimal: 4e18

Square: 399680064

Square Root: 141.3930691370691

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

Triangle read by rows: T(n,k) = number of lattice paths from (0,0) to (n,k) that do not go below the line y=0 and consist of steps U=(1,1), D=(1,-1) and three types of steps H=(1,0) (left factors of 3-Motzkin steps). A91965

T(n,k)=Number of length n+4 0..k arrays with no pair in any consecutive five terms totalling exactly k. A246737

T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock trace equal to any horizontal or vertical neighbor 2X2 subblock trace. A185769

Numbers k such that the largest unitary divisor of σ(k) that is coprime with A003961(k) is also a unitary divisor of k. A351551

Triangle read by rows: T(n,k) = number of nonequivalent dissections of an n-gon into k polygons by nonintersecting diagonals up to rotation. A295633

a(n) = n*(n-1)*(n+1)*(3·n-2)/12. A153978

Second elementary symmetric function of 3,4,...,n+3. A24183

a(n) = k where R(k+8) = 2. A86948

a(n) = (n+1)*(n+2)²*(n+3)²*(n+4)*(2·n² + 6·n + 5)/720. A108645

Number of squares in 3-dimensional space whose four vertices have coordinates (x,y,z) in the set {1,...,n}. A334881