Properties of the Number -18745

Eighteen Thousand Seven Hundred Forty-Five

Basics

Value: -18746 → -18745 → -18744

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 23 × 163

Divisors: 1, 5, 23, 115, 163, 815, 3749, 18745

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100100100111001

Octal: -44471

Duodecimal: -AA21

Hexadecimal: -4939

Square: 351375025

Square Root: 136.91238074038446

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 2·n with n maximal anti-runs. A337504

Numbers k such that k⁶*2^k - 1 is a prime. A367478

Products of 3 evil primes (A027699) p,q,r, such that numbers p·q, p·r, q·r, and p·q*r are odious (A000069). A230353

a(n) = ∑_{1 <= x₁, x₂ <= n} σ( n/gcd(x₁, x₂, n) ). A373129

Largest eigenvalue, rounded to the nearest integer, of a rank n matrix of 1..n² filled successively along antidiagonals (A069480). A72332

Composite numbers coprime to 6 such that A179382(n) = A000265(n-1), the odd part of n-1. A225913

Numbers k such that the sum of k, the divisors of k, and the numbers < k that are coprime to k, is a perfect power. A352876