20336 has 20 divisors (see below), whose sum is σ = 41664. Its totient is φ = 9600.

The previous prime is 20333. The next prime is 20341. The reversal of 20336 is 63302.

20336 = 9² + 10² + ... + 39².

20336 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 516.

2²⁰³³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20832).

20336 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20336 is a wasteful number, since it uses less digits than its factorization.

20336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20336 is about 142.6043477598. The cubic root of 20336 is about 27.2953401681.

Adding to 20336 its reverse (63302), we get a palindrome (83638).

The spelling of 20336 in words is "twenty thousand, three hundred thirty-six".