Properties of the Number 15020

Fifteen Thousand Twenty

Basics

Value: 15019 → 15020 → 15021

Parity: even

Prime: No

Previous Prime: 15017

Next Prime: 15031

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 751

Divisors: 1, 2, 4, 5, 10, 20, 751, 1502, 3004, 3755

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11101010101100

Octal: 35254

Duodecimal: 8838

Hexadecimal: 3aac

Square: 225600400

Square Root: 122.55610959882824

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 n such that Bernoulli number B_n has denominator 330. A272183

a(n) = ∑_k=1..n+1 A027960(n+1, n+1+k). A27974

Number of non-isomorphic multiset partitions of weight n where each part has a different length. A326026

Number of overcompositions of n minus the number of compositions of n. A236633

Inverse binomial transform of A014217. A142585

Expansion of ∏_k>=1 1/(1 - x^k*(k+1/2))². A298435

a(n) = 1000·n + 20. A157510

S(n,n) + S(n-1,n-2) + S(n-2,n-4) + ... + S(n-k+1,n-2k+2), where k = [ (n+1)/2 ] and S(i,j) are Stirling numbers of second kind. A24428

a(0)=a(1)=1. For n >= 2, if a(n-1) is coprime to n, then a(n) = a(n-1) + a(n-2). Otherwise, a(n)=1. A139047

a(n) = a(n-1) + a(n-2) - 2^n-1 with a(0)=a(2)=0, a(1)=-a(3)=1, a(4)=-5. A227200