Properties of the Number 18956

Eighteen Thousand Nine Hundred Fifty-Six

Basics

Value: 18955 → 18956 → 18957

Parity: even

Prime: No

Previous Prime: 18947

Next Prime: 18959

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 7 × 677

Divisors: 1, 2, 4, 7, 14, 28, 677, 1354, 2708, 4739

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101000001100

Octal: 45014

Duodecimal: AB78

Hexadecimal: 4a0c

Square: 359329936

Square Root: 137.68079023596573

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

Numbers that are the sum of 6 positive 7th powers. A3373

Triangle read by rows: number of set partitions of n elements with k connectors, 0<=k<n. A185982

Sum of the second largest parts in the partitions of n into 8 parts. A308997

Number of partitions of n such that the number of different parts is odd. A90794

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. A316953

Number of partitions of n³ into n nonzero squares. A133103

a(n) = ∑_{k=0..floor(n/3)} binomial(k+3,3) * binomial(k,n-3·k)². A377150

Number of set partitions of [n] having exactly two pairs (m,m+1) such that m is in some block b and m+1 is in block b+1. A271789

a(0) = 1, a(n) = 26·n² + 2 for n>0. A10016

Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north, southwest or southeast neighbor modulo 3 and the upper left element equal to 0. A266922