Properties of the Number -20427264

Twenty Million Four Hundred Twenty-Seven Thousand Two Hundred Sixty-Four

Basics

Value: -20427265 → -20427264 → -20427263

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ⁹ × 3 ² × 11 × 13 × 31

Divisors: 1, 2, 3, 4, 6, 8, 9, 11, 12, 13

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1001101111011001000000000

Octal: -115731000

Duodecimal: -6A11400

Hexadecimal: -137b200

Square: 417273114525696

Square Root: 4519.653084032004

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 m with half-integral abundancy index, σ(m)/m = k+1/2 with integer k. A159907

Numbers k such that σ(k) = 7k/2. A55153

Number of unordered pairs of self-avoiding paths with nodes that cover all vertices of a convex n-gon. A332426

Numbers n such that antisigma(n) mod n = 0, where antisigma(n) = A024816(n) = sum of numbers less than n which do not divide n. A242484

Numbers n such that gcd(σ(n), n) > gcd(σ(m), m) for all m < n. A216793

Numbers k that divide 2*σ(k). A246454

Numbers n with the property that, if τ(n) = k = number of divisors of n, and the d(i) are the divisors [arranged in increasing order], then the sum 1/d(k) + 1/d(k-1) + 1/d(k-2) + ... + 1/d(q) is an integer for some q. A226476

Integers m such that the sum of the first k divisors is equal to 2·m for some k less than the number of divisors of m. A306373