20189798 has 8 divisors (see below), whose sum is σ = 30488400. Its totient is φ = 10027000.

The previous prime is 20189797. The next prime is 20189821. The reversal of 20189798 is 89798102.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20189797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33578 + ... + 34173.

It is an arithmetic number, because the mean of its divisors is an integer number (3811050).

Almost surely, 2^20189798 is an apocalyptic number.

20189798 is a deficient number, since it is larger than the sum of its proper divisors (10298602).

20189798 is a wasteful number, since it uses less digits than its factorization.

20189798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67902.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 20189798 is about 4493.3059099064. The cubic root of 20189798 is about 272.2977114413.

The spelling of 20189798 in words is "twenty million, one hundred eighty-nine thousand, seven hundred ninety-eight".