20021001198 has 32 divisors (see below), whose sum is σ = 43689445632. Its totient is φ = 6065961600.

The previous prime is 20021001193. The next prime is 20021001229. The reversal of 20021001198 is 89110012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021001191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439158 + ... + 482598.

It is an arithmetic number, because the mean of its divisors is an integer number (1365295176).

Almost surely, 2^20021001198 is an apocalyptic number.

20021001198 is an abundant number, since it is smaller than the sum of its proper divisors (23668444434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021001198 is a wasteful number, since it uses less digits than its factorization.

20021001198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50440.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 20021001198 in words is "twenty billion, twenty-one million, one thousand, one hundred ninety-eight".