Properties of the Number 20553

Twenty Thousand Five Hundred Fifty-Three

Basics

Value: 20552 → 20553 → 20554

Parity: odd

Prime: No

Previous Prime: 20551

Next Prime: 20563

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 13 × 17 × 31

Divisors: 1, 3, 13, 17, 31, 39, 51, 93, 221, 403

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000001001001

Octal: 50111

Duodecimal: BA89

Hexadecimal: 5049

Square: 422425809

Square Root: 143.36317518805168

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

Number of compositions of n with strictly increasing differences. A325547

Non-palindromic numbers n such that φ(n) = φ(reversal(n)). A97647

Numbers k such that k + σ(k) + σ(σ(k)) is a square. A116014

Squarefree numbers which yield zero when their prime factors are xored together. A235488

Nonsquares with A072594(n) = 0. A72596

Where the first 3n primes are partitioned into 3 sets of cardinality n, the minimum of the largest product. A260075

a(n) = floor( n*(n-1)*(n-2)*(n-3)/32 ). A11942

Number of (w,x,y,z) with all terms in {1,...,n} and w+x=|x-y|+|y-z|. A212676

27-gonal pyramidal numbers: a(n) = n*(n+1)*(25·n-22)/6. A256647

Numbers k such that σ(k) - φ(k) is a 4th power. A115918