Properties of the Number 18687

Eighteen Thousand Six Hundred Eighty-Seven

Basics

Value: 18686 → 18687 → 18688

Parity: odd

Prime: No

Previous Prime: 18679

Next Prime: 18691

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 6229

Divisors: 1, 3, 6229, 18687

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100011111111

Octal: 44377

Duodecimal: A993

Hexadecimal: 48ff

Square: 349203969

Square Root: 136.70040234030037

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

Convolution of Fibonacci numbers and {F(2), F(3), F(4), ...}. A23610

Square array A(n,k), n>=0, k>=0, read by antidiagonals: A(n,k) is the number of partitions of n^k into powers of k. A196879

Number of Bottleneck-Monge matrices with 2 rows. In the formula below, P = 2. A70050

Numbers with multiplicative persistence value 6. A46515

Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 421", based on the 5-celled von Neumann neighborhood. A288067

Number of 3-connected Schnyder labelings with n inner faces in the quadrangular dissection, whose outer white vertices are non-isolated. A377921

Number of partitions of n³ into powers of 3. A196881

Number of partitions of 7ⁿ into powers of n. A196894

Expansion of 1/(1 - x - x⁵ + x⁶ - x⁷ - x¹¹ + x¹²). A225500

Expansion of (η(q⁶)/(η(q)*η(q²)*η(q³)))² in powers of q. A293378