Properties of the Number 18472

Eighteen Thousand Four Hundred Seventy-Two

Basics

Value: 18471 → 18472 → 18473

Parity: even

Prime: No

Previous Prime: 18461

Next Prime: 18481

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 2309

Divisors: 1, 2, 4, 8, 2309, 4618, 9236, 18472

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100000101000

Octal: 44050

Duodecimal: A834

Hexadecimal: 4828

Square: 341214784

Square Root: 135.91173606425605

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 nX2 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero. A304341

Number of 8k+5 primes (A007521) in range ]2ⁿ,2ⁿ⁺¹]. A95011

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 214", based on the 5-celled von Neumann neighborhood. A286736

Number of integer partitions of n with no 1's such that no part is a power of any other (unequal) part. A323053

G.f. satisfies A(x) = 1 + x·A(x)*(1 + x⁵*A(x)²). A365732

Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=0, k=-2 and l=0. A177110

Number of 4Xn 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A281403

Numbers whose base-4 representation contains exactly four 0's and three 2's. A45060

a(n) = (9·n³ + 5·n)/2. A230018

T(n,k)=Number of nXk 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A281400