20598 has 8 divisors (see below), whose sum is σ = 41208. Its totient is φ = 6864.

The previous prime is 20593. The next prime is 20599. The reversal of 20598 is 89502.

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

20598 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1711 + ... + 1722.

It is an arithmetic number, because the mean of its divisors is an integer number (5151).

2²⁰⁵⁹⁸ is an apocalyptic number.

20598 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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20604).

20598 is a wasteful number, since it uses less digits than its factorization.

20598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20598 is about 143.5200334448. The cubic root of 20598 is about 27.4120606858.

It can be divided in two parts, 205 and 98, that added together give a palindrome (303).

The spelling of 20598 in words is "twenty thousand, five hundred ninety-eight".