Properties of the Number 18354

Eighteen Thousand Three Hundred Fifty-Four

Basics

Value: 18353 → 18354 → 18355

Parity: even

Prime: No

Previous Prime: 18353

Next Prime: 18367

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 19 × 23

Divisors: 1, 2, 3, 6, 7, 14, 19, 21, 23, 38

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011110110010

Octal: 43662

Duodecimal: A756

Hexadecimal: 47b2

Square: 336869316

Square Root: 135.47693530634652

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

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n)², where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A296245

Otto Haxel's guess for magic numbers of nuclear shells. A33547

G.f. satisfies: A(x) = Series_Reversion(x - x²*A'(x)²). A360977

Numbers k such that the central binomial coefficient C(2k,k) is divisible by k². A121943

a(n) = largest value of the function rad(m·n*(n - m)) n=2,3,4,..., 0 < m < n where the function rad(k) (also called radical(k)) is the product of distinct prime divisors of k. A147299

T(n,k)=Number of nXk 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 1,3,2,4,0 for x=0,1,2,3,4. A196922

Number of ways to write n as an ordered sum of 7 nonprime numbers. A341484

A Moessner triangle using (1, 3, 5, ...). A125750

If 0 <= n <= 3 then a(n) = n(n+1)(n+2)/3, if n >= 4 then a(n) = n(n²+5)/3. A162626

Areas of primitive Pythagorean triangles that are sums of two or more consecutive primes. A383395