Properties of the Number 20940

Twenty Thousand Nine Hundred Forty

Basics

Value: 20939 → 20940 → 20941

Parity: even

Prime: No

Previous Prime: 20939

Next Prime: 20947

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 349

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000111001100

Octal: 50714

Duodecimal: 10150

Hexadecimal: 51cc

Square: 438483600

Square Root: 144.70659971127785

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

Sum of the squared parts of the partitions of n into exactly two parts. A226141

Poly-Cauchy numbers of the second kind hat c_n^-4. A223902

T(n,k)=Number of nXk arrays of permutations of 0..n·k-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 5. A264659

Records in A065925. A65927

Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=w+|y-z|. A212685

Array read by ascending antidiagonals: A(n, k) is the number of (n, k)-poly-Cauchy permutations. A344639

Numbers which divide the concatenation, in ascending order, of their anti-divisors. A249764

Partial sums of A071619. A358042

Numerator of Euler(n, 5/17). A156545

Number of binary strings of length n with equal numbers of 0010 and 1011 substrings. A164171