Properties of the Number 20474

Twenty Thousand Four Hundred Seventy-Four

Basics

Value: 20473 → 20474 → 20475

Parity: even

Prime: No

Previous Prime: 20443

Next Prime: 20477

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 29 × 353

Divisors: 1, 2, 29, 58, 353, 706, 10237, 20474

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 100111111111010

Octal: 47772

Duodecimal: BA22

Hexadecimal: 4ffa

Square: 419184676

Square Root: 143.0873858870865

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) = binomial(n+5,4) - 1. A63258

Prime(a(n)) + ... + prime(a(n)+3) is a square = A051395(n)². A72849

a(n) = a(n-1) + 2·a(n-4) - 2·a(n-5) for n >= 5, where a(0) = 2, a(1) = 4, a(2) = 6, a(3) = 8, a(4) = 10. A288732

G.f.: (1+3·x+2·x²)/((1-x)*(1-2·x²)). A63757

Triangle T(n, k, q) = (1-qⁿ)*( binomial(n, k) - 1 ) + 1, with q = 4, read by rows. A174720

Even composite integers m such that U(m)² == 1 (mod m) and V(m) == 7 (mod m), where U(m)=A004187(m) and V(m)=A056854(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=7 and b=1, respectively. A337782

A Motzkin triangle: a(n,k), n >= 2, 2 <= k <= n, = number of complete, strictly subdiagonal staircase functions. A20474

This sequence is obtained from the concatenation of certain representative members of a family of related sequences, each of which enumerates weight products along vertex paths. A260095