Properties of the Number 20480

Twenty Thousand Four Hundred Eighty

Basics

Value: 20479 → 20480 → 20481

Parity: even

Prime: No

Previous Prime: 20479

Next Prime: 20483

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ¹² × 5

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000000000000

Octal: 50000

Duodecimal: BA28

Hexadecimal: 5000

Square: 419430400

Square Root: 143.10835055998655

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Expansion of (1+x)/(1-4·x). A3947

a(n) = 5·2ⁿ. A20714

Numbers of the form 2^k times 1, 3 or 5. A29747

a(n) is the maximal number of a's that can be produced in a blank document with n "keystrokes". A193286

Numbers that are the sum of 10 positive 11th powers. A4821

Numbers whose prime factors are 2 and 5. A33846

13-almost primes (generalization of semiprimes). A69274

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of nⁿ as Sum(k=0..n)T(n,k)*binomial(n,k). A244120

a(n) is the smallest number of divisors of pⁿ - 1 that may possibly occur for arbitrarily large primes p. A309906

a(n) = ∑_{d∣n, n/d=1 mod 4} d⁴ - ∑_{d∣n, n/d=3 mod 4} d⁴. A50468