Properties of the Number 19478

Nineteen Thousand Four Hundred Seventy-Eight

Basics

Value: 19477 → 19478 → 19479

Parity: even

Prime: No

Previous Prime: 19477

Next Prime: 19483

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 × 9739

Divisors: 1, 2, 9739, 19478

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110000010110

Octal: 46026

Duodecimal: B332

Hexadecimal: 4c16

Square: 379392484

Square Root: 139.56360557108002

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) = T(n,n-4), array T as in A055818. A55821

Number of twice-partitions of n into partitions with all odd lengths and sums. A358827

Numbers that are partial sums of the reverses of the sequence of primes and are reverses of primes. A381245

Number of partitions of n into parts not of the form 21k, 21k+6 or 21k-6. Also number of partitions with at most 5 parts of size 1 and differences between parts at distance 9 are greater than 1. A35984

a(n) = 5·a(n-1) + a(n-2) - 3·a(n-3). A19478