198439842022 has 4 divisors (see below), whose sum is σ = 297659763036. Its totient is φ = 99219921010.

The previous prime is 198439841969. The next prime is 198439842043. The reversal of 198439842022 is 220248934891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220248934891 = 20407 ⋅10792813.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49609960504 + ... + 49609960507.

It is an arithmetic number, because the mean of its divisors is an integer number (74414940759).

Almost surely, 2^198439842022 is an apocalyptic number.

198439842022 is a deficient number, since it is larger than the sum of its proper divisors (99219921014).

198439842022 is an equidigital number, since it uses as much as digits as its factorization.

198439842022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99219921013.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 198439842022 in words is "one hundred ninety-eight billion, four hundred thirty-nine million, eight hundred forty-two thousand, twenty-two".