Properties of the Number 8018

Eight Thousand Eighteen

Basics

Value: 8017 → 8018 → 8019

Parity: even

Prime: No

Previous Prime: 8017

Next Prime: 8039

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 19 × 211

Divisors: 1, 2, 19, 38, 211, 422, 4009, 8018

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111101010010

Octal: 17522

Duodecimal: 4782

Hexadecimal: 1f52

Square: 64288324

Square Root: 89.54328562209453

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) = ∑_k=3..n (k-1)!*C(n,k)/2. A2807

Numbers divisible by prime(d) for each digit d in their base-9 representation, none of which may be zero. A256879

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change -1,0 0,2 -1,-2 or 1,0. A264520

a(n) = a(n-1) + a(m) for n >= 3, where m = 2^p+1 + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^p+1, starting with a(1) = 1 and a(2) = 3. A50069

a(n) = 6ⁿ + 3ⁿ - 1. A155604

Nearest integer to 100·1.1ⁿ. A204590

Array read by antidiagonals: T(n,m) is the number of (undirected) cycles in the rook graph K_n X K_m. A286418

Numbers k such that k⁸ == 1 (mod 9³). A56084

Collatz (or 3x+1) trajectory starting at 703. A161021

Number of distinct functions f representable as x -> x^x^...^x with n x's and parentheses inserted in all possible ways giving result f(0)=1, with conventions that 0⁰=1⁰=1¹=1, 0¹=0. A222380