198019982 has 4 divisors (see below), whose sum is σ = 297029976. Its totient is φ = 99009990.

The previous prime is 198019979. The next prime is 198020021. The reversal of 198019982 is 289910891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49504994 + ... + 49504997.

It is an arithmetic number, because the mean of its divisors is an integer number (74257494).

Almost surely, 2^198019982 is an apocalyptic number.

198019982 is a deficient number, since it is larger than the sum of its proper divisors (99009994).

198019982 is an equidigital number, since it uses as much as digits as its factorization.

198019982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99009993.

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 198019982 is about 14071.9572910097. The cubic root of 198019982 is about 582.8672745042.

The spelling of 198019982 in words is "one hundred ninety-eight million, nineteen thousand, nine hundred eighty-two".