20800198 has 8 divisors (see below), whose sum is σ = 31223808. Its totient is φ = 10392264.

The previous prime is 20800183. The next prime is 20800201. The reversal of 20800198 is 89100802.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (3902976).

Almost surely, 2^20800198 is an apocalyptic number.

20800198 is a deficient number, since it is larger than the sum of its proper divisors (10423610).

20800198 is a wasteful number, since it uses less digits than its factorization.

20800198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7838.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 20800198 is about 4560.7234075309. The cubic root of 20800198 is about 275.0146460519.

The spelling of 20800198 in words is "twenty million, eight hundred thousand, one hundred ninety-eight".