20359 has 2 divisors, whose sum is σ = 20360. Its totient is φ = 20358.

The previous prime is 20357. The next prime is 20369. The reversal of 20359 is 95302.

20359 = T₁₁₅ + T₁₁₆ + T₁₁₇.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20359 - 2¹ = 20357 is a prime.

Together with 20357, it forms a pair of twin primes.

20359 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10179 + 10180.

It is an arithmetic number, because the mean of its divisors is an integer number (10180).

2²⁰³⁵⁹ is an apocalyptic number.

20359 is the 117-th centered triangular number.

20359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20359 is an equidigital number, since it uses as much as digits as its factorization.

20359 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20359 is about 142.6849676735. The cubic root of 20359 is about 27.3056266272.

It can be divided in two parts, 203 and 59, that added together give a palindrome (262).

The spelling of 20359 in words is "twenty thousand, three hundred fifty-nine".