Properties of the Number 22018

Twenty-Two Thousand Eighteen

Basics

Value: 22017 → 22018 → 22019

Parity: even

Prime: No

Previous Prime: 22013

Next Prime: 22027

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 101 × 109

Divisors: 1, 2, 101, 109, 202, 218, 11009, 22018

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101011000000010

Octal: 53002

Duodecimal: 108AA

Hexadecimal: 5602

Square: 484792324

Square Root: 148.38463532320318

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

Number of partitions of n such that some part is a sum of two other parts. A237113

T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 100 in rows, columns and nw-to-se diagonals. A202591

a(n) = 169·n² + 140·n + 29. A156640

Expansion of (2 - 2·x) / (1 - 10·x - 7·x²). A157765

Number of (n+2) X (n+2) binary arrays avoiding patterns 001 and 100 in rows, columns and nw-to-se diagonals. A202583

Number of (n+2)X5 binary arrays avoiding patterns 001 and 100 in rows, columns and nw-to-se diagonals. A202586

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}. A150155

Numbers k such that 343·2^k+1 is prime. A322964

Define the sequence UD(a(0),a(1)) by a(n) is the least integer such that a(n)/a(n-1) > a(n-1)/a(n-2)+1 for even n >= 2 and such that a(n)/a(n-1) > a(n-1)/a(n-2) for odd n>=2. This is UD(2,16). A22018