20935 has 8 divisors (see below), whose sum is σ = 25920. Its totient is φ = 16224.

The previous prime is 20929. The next prime is 20939. The reversal of 20935 is 53902.

20935 = T₈₉ + T₉₀ + ... + T₉₃.

20935 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20935 - 2⁵ = 20903 is a prime.

20935 is strictly pandigital in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 304.

It is an arithmetic number, because the mean of its divisors is an integer number (3240).

2²⁰⁹³⁵ is an apocalyptic number.

20935 is a deficient number, since it is larger than the sum of its proper divisors (4985).

20935 is an equidigital number, since it uses as much as digits as its factorization.

20935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 20935 is about 144.6893223427. The cubic root of 20935 is about 27.5607472538.

The spelling of 20935 in words is "twenty thousand, nine hundred thirty-five".