198020011 has 4 divisors (see below), whose sum is σ = 226308592. Its totient is φ = 169731432.

The previous prime is 198019979. The next prime is 198020021. The reversal of 198020011 is 110020891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198020011 - 2⁵ = 198019979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198020021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14144280 + ... + 14144293.

It is an arithmetic number, because the mean of its divisors is an integer number (56577148).

Almost surely, 2^198020011 is an apocalyptic number.

198020011 is a deficient number, since it is larger than the sum of its proper divisors (28288581).

198020011 is an equidigital number, since it uses as much as digits as its factorization.

198020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28288580.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 198020011 is about 14071.9583214278. The cubic root of 198020011 is about 582.8673029578.

The spelling of 198020011 in words is "one hundred ninety-eight million, twenty thousand, eleven".