Properties of the Number 20924

Twenty Thousand Nine Hundred Twenty-Four

Basics

Value: 20923 → 20924 → 20925

Parity: even

Prime: No

Previous Prime: 20921

Next Prime: 20929

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5231

Divisors: 1, 2, 4, 5231, 10462, 20924

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000110111100

Octal: 50674

Duodecimal: 10138

Hexadecimal: 51bc

Square: 437813776

Square Root: 144.65130486794789

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, k) is the k-th number b > 1 such that b^prime(n+i-1) == 1 (mod prime(n+i)²) for each i = 0..3, with k running over the positive integers; square array, read by antidiagonals, downwards. A319061

Antidiagonal sums of table A122888. A122889

Number of partitions p of n such that median(p) < multiplicity(min(p)). A240212

Number of n-bead necklaces labeled with numbers 1..4 not allowing reversal, with no adjacent beads differing by more than 1. A208773

a(n) = ∑_k=0..n (-1)^k * binomial(2·n+k-1,k) * binomial(4·n-k-1,n-k). A370103

Numbers k such that A099850(k) is divisible by k. A99851

Number of squares (of another matrix) in the group GL(2,Z_n) described in sequence A000252. A68516

Number of n X 2 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4. A239844

Numbers whose base-12 representation has exactly 5 runs. A43654

Numbers k such that 5·R_k + 7·10^k + 2 is prime, where R_k = 11...11 is the repunit (A002275) of length k. A259132