Properties of the Number 20136

Twenty Thousand One Hundred Thirty-Six

Basics

Value: 20135 → 20136 → 20137

Parity: even

Prime: No

Previous Prime: 20129

Next Prime: 20143

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 839

Divisors: 1, 2, 3, 4, 6, 8, 12, 24, 839, 1678

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111010101000

Octal: 47250

Duodecimal: B7A0

Hexadecimal: 4ea8

Square: 405458496

Square Root: 141.9013742005341

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 k² + 1 divides 2^k + 1. A247220

a(n) = 839·n. A135639

Triangle T(n, k) = k*(n-1)! - k!, read by rows. A137260

Expansion of (1/(1 - x)) * ∑_k>=1 k·x^k/(x^k + (1 - x)^k). A320586

Terms of A143407, sorted. A270564

Number of n X 6 0..1 arrays with every element equal to 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero. A298175

Triangle lc(n,k): the number of purely line-connected k-partitions of [n], n>=4, 3<=k<n. A305874

a(n) = smallest k such that ∑_i=1..k log(p_i)/p_i >= n, where p_i is the i-th prime. A347310

Numbers such that the two numbers before and the two numbers after are squarefree semiprimes. A358666

Fermat pseudoprimes to base 4. A20136