Properties of the Number 21418

Twenty-One Thousand Four Hundred Eighteen

Basics

Value: 21417 → 21418 → 21419

Parity: even

Prime: No

Previous Prime: 21407

Next Prime: 21419

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 10709

Divisors: 1, 2, 10709, 21418

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001110101010

Octal: 51652

Duodecimal: 1048A

Hexadecimal: 53aa

Square: 458730724

Square Root: 146.3488981851247

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 k such that 100k+1, 100k+3, 100k+7, 100k+9 are all primes. A64687

Number of rooted identity trees with 2-colored leaves. A38075

Number of integer partitions of n whose number of nontrivial submultisets is greater than their number of distinct parts times their number of parts minus 1. A328960

Number of paths on square lattice. A6191

Numbers for which the cube of the sum of the digits is equal to the square of the product of their digits. A241846

Number of ways to reciprocally link elements of an 5 X n array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links. A220710

Number of partitions in parts not of the form 25k, 25k+3 or 25k-3. Also number of partitions with at most 2 parts of size 1 and differences between parts at distance 11 are greater than 1. A36002

T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two horizontal and antidiagonal neighbors, without consecutive collinear links. A220708

Decimal expansion of 1/414. A21418