20100198 has 16 divisors (see below), whose sum is σ = 40273920. Its totient is φ = 6687816.

The previous prime is 20100191. The next prime is 20100203. The reversal of 20100198 is 89100102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (2517120).

Almost surely, 2^20100198 is an apocalyptic number.

20100198 is an abundant number, since it is smaller than the sum of its proper divisors (20173722).

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

20100198 is a wasteful number, since it uses less digits than its factorization.

20100198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 20100198 is about 4483.3244361746. The cubic root of 20100198 is about 271.8943054596.

The spelling of 20100198 in words is "twenty million, one hundred thousand, one hundred ninety-eight".