Properties of the Number 20008

Twenty Thousand Eight

Basics

Value: 20007 → 20008 → 20009

Parity: even

Prime: No

Previous Prime: 19997

Next Prime: 20011

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 41 × 61

Divisors: 1, 2, 4, 8, 41, 61, 82, 122, 164, 244

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111000101000

Octal: 47050

Duodecimal: B6B4

Hexadecimal: 4e28

Square: 400320064

Square Root: 141.4496376806954

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

Even octagonal numbers: a(n) = 4·n*(3·n-1). A14642

List the positions of all digits '1' in the sequence. This is the lexicographically earliest increasing sequence with this property. A98645

Intrinsic 10-palindromes: n is an intrinsic k-palindrome if it is a k-digit palindrome in some base. A60947

Expansion of ∏_n>=1 (1 + (4·x)ⁿ)^1/2. A298994

T(n,k) = ∑_d∣k φ(d)*n^k/d/k, triangle read by rows, T(n,k) for n >= 1 and 1 <= k <= n. A54630

Number of ways to color vertices of a pentagon using <= n colors, allowing only rotations. A54620

Expansion of ∏_m>=1 (1+q^m)^-14. A22609

Number of n-bead necklaces with 10 colors. A54629

Centered 27-gonal numbers. A389797

a(n) = (a(n-1) + a(n-4))/gcd(a(n-1), a(n-4)) with a(1) = a(2) = a(3) = a(4) = 1. A214652