Properties of the Number 18925

Eighteen Thousand Nine Hundred Twenty-Five

Basics

Value: 18924 → 18925 → 18926

Parity: odd

Prime: No

Previous Prime: 18919

Next Prime: 18947

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 ² × 757

Divisors: 1, 5, 25, 757, 3785, 18925

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100111101101

Octal: 44755

Duodecimal: AB51

Hexadecimal: 49ed

Square: 358155625

Square Root: 137.56816492197603

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) = ∑_{1 <= i <= j <= k <= n} gcd(i,j,k). A344521

The period after which the powers of n repeat on an 8-digit calculator. A216068

Composite numbers whose prime factors contain no digits other than 5 and 7. A36320

Numbers k such that the continued fraction for sqrt(k) has period 41. A20380

Numbers k such that k! has a palindromic prime number of digits. A35067

Numbers k such that σ(k²+1) is a perfect square. A67465

a(0)=1; thereafter a(n) = ∑_k=2..n+1 A006206(k). A286271

Base 3 digits are, in order, the first n terms of the periodic sequence with initial period 2,2,1. A37560

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (0, 0, 1), (0, 1, -1), (1, 0, 0)}. A149859

Number of isotropic subspaces of a 2n-dimensional unitary space over GF(4). A18925