20235 has 16 divisors (see below), whose sum is σ = 34560. Its totient is φ = 10080.

The previous prime is 20233. The next prime is 20249. The reversal of 20235 is 53202.

It is not a de Polignac number, because 20235 - 2¹ = 20233 is a prime.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 20235.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250 + ... + 320.

It is an arithmetic number, because the mean of its divisors is an integer number (2160).

2²⁰²³⁵ is an apocalyptic number.

20235 is a deficient number, since it is larger than the sum of its proper divisors (14325).

20235 is a wasteful number, since it uses less digits than its factorization.

20235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98.

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 20235 is about 142.2497803162. The cubic root of 20235 is about 27.2500771538.

Adding to 20235 its reverse (53202), we get a palindrome (73437).

The spelling of 20235 in words is "twenty thousand, two hundred thirty-five".