Properties of the Number 19712

Nineteen Thousand Seven Hundred Twelve

Basics

Value: 19711 → 19712 → 19713

Parity: even

Prime: No

Previous Prime: 19709

Next Prime: 19717

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁸ × 7 × 11

Divisors: 1, 2, 4, 7, 8, 11, 14, 16, 22, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110100000000

Octal: 46400

Duodecimal: B4A8

Hexadecimal: 4d00

Square: 388562944

Square Root: 140.39943019827396

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) is the coefficient of x^k in the polynomial 1 - T_n(x)², where T_n(x) is the n-th Chebyshev polynomial of the first kind. A123583

Composites whose prime factorization in base 5 is an anagram of the number in base 5. A260049

Triangle read by rows: T(n, k) is the coefficient of x^k in the polynomial 1 - ChT(n, x^1/2)², where ChT(n, x) is the n-th Chebyshev polynomial of the first kind, evaluated at x (0 <= k <= n). A123588

T(n,k) = Number of (n+2) X (k+2) binary arrays avoiding patterns 000 and 011 in rows, columns and nw-to-se diagonals. A202777

a(n) = 2·a(n-1) - 6·a(n-2), a(0)=0, a(1)=1. A88139

Numbers that are the sum of four third powers in six or more ways. A345148

Numbers that are the sum of four third powers in exactly six ways. A345149

a(n) = C(2n-1,n-1) mod n³. A99907

Numbers of the form p⁸*q·r where p, q, and r are distinct primes. A179747

Table of coefficients of a polynomial sequence related to the Springer numbers. A185417