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Properties of the Number 18768

Eighteen Thousand Seven Hundred Sixty-Eight

Basics

Value: 18767 → 18768 → 18769

Parity: even

Prime: No

Previous Prime: 18757

Next Prime: 18773

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 4 × 3 × 17 × 23

Divisors: 1, 2, 3, 4, 6, 8, 12, 16, 17, 23

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100100101010000

Octal: 44520

Duodecimal: AA40

Hexadecimal: 4950

Square: 352237824

Square Root: 136.99635031634966

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

a(n) = (prime(n)-1)*(prime(n)+1). A84920
Regular triangle read by rows: T(n,k) is the number of multiset partitions of normal multisets of size n into k blocks, where a multiset is normal if it spans an initial interval of positive integers. A317532
T(n,k)=Number of length n+4 0..k arrays with no pair in any consecutive five terms totalling exactly k. A246737
Smallest base b > 1 such that both prime(n) and prime(n+1) are base-b Wieferich primes, i.e., p = prime(n) satisfies bp-1 == 1 (mod p2) and q = prime(n+1) satisfies bq-1 == 1 (mod q2). A259075
Expansion of e.g.f. log(1/(1-arcsin(x))). A189815
Product of prime(n+1)-1 and prime(n)-1. A83553
Triangular array read by rows: a(n, k) = sum of number of ordered factorizations of all prime signatures with n total prime factors and k distinct prime factors. A95705
Distinct even elements in the 5-Pascal triangle A028313. A28320
Even elements to the right of the central elements of the 5-Pascal triangle A028313. A28321
Numbers with multiplicative persistence value 6. A46515