20698 has 8 divisors (see below), whose sum is σ = 31680. Its totient is φ = 10140.

The previous prime is 20693. The next prime is 20707. The reversal of 20698 is 89602.

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

It is not an unprimeable number, because it can be changed into a prime (20693) 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, 93 + ... + 223.

It is an arithmetic number, because the mean of its divisors is an integer number (3960).

2²⁰⁶⁹⁸ is an apocalyptic number.

20698 is a deficient number, since it is larger than the sum of its proper divisors (10982).

20698 is a wasteful number, since it uses less digits than its factorization.

20698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20698 is about 143.8679950510. The cubic root of 20698 is about 27.4563494833.

The spelling of 20698 in words is "twenty thousand, six hundred ninety-eight".