20098 has 8 divisors (see below), whose sum is σ = 32508. Its totient is φ = 9264.

The previous prime is 20089. The next prime is 20101. The reversal of 20098 is 89002.

It can be written as a sum of positive squares in 2 ways, for example, as 16129 + 3969 = 127^2 + 63^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361 + ... + 412.

2²⁰⁰⁹⁸ is an apocalyptic number.

20098 is a deficient number, since it is larger than the sum of its proper divisors (12410).

20098 is a wasteful number, since it uses less digits than its factorization.

20098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 20098 is about 141.7674151560. The cubic root of 20098 is about 27.1884394355.

It can be divided in two parts, 200 and 98, that multiplied together give a square (19600 = 140²).

The spelling of 20098 in words is "twenty thousand, ninety-eight".