Properties of the Number 20402

Twenty Thousand Four Hundred Two

Basics

Value: 20401 → 20402 → 20403

Parity: even

Prime: No

Previous Prime: 20399

Next Prime: 20407

Digit Sum: 8

Digital Root: 8

Palindrome: Yes

Factorization: 2 × 101 ²

Divisors: 1, 2, 101, 202, 10201, 20402

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111110110010

Octal: 47662

Duodecimal: B982

Hexadecimal: 4fb2

Square: 416241604

Square Root: 142.8355697996826

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 partitions of n such that some part is a sum of two or more other parts. A237668

a(n) = 2·prime(n)². A79704

2·p², for p an odd prime. A143928

a(n) is the smallest palindrome > a(n-1) such that a(1)+a(2)+...+a(n) is a prime. A51934

Base-10 palindromes that start with 2. A43037

Numbers n such that n, n+1, n+2 are all of the form p·q² for distinct primes p,q. A178032

Numbers such that the difference between the sum of the even divisors and the sum of the odd divisors is prime. A195382

Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers (without the dots). A210890

Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers. Leading zeros of the terms are suppressed. A210892

Matula-Goebel tree number of tree n with a new leaf added below each existing vertex. A348067