20102198 has 12 divisors (see below), whose sum is σ = 31160340. Its totient is φ = 9725940.

The previous prime is 20102153. The next prime is 20102213. The reversal of 20102198 is 89120102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3308 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (2596695).

Almost surely, 2^20102198 is an apocalyptic number.

20102198 is a deficient number, since it is larger than the sum of its proper divisors (11058142).

20102198 is a wasteful number, since it uses less digits than its factorization.

20102198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10523 (or 10492 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 20102198 is about 4483.5474793962. The cubic root of 20102198 is about 271.9033231249.

The spelling of 20102198 in words is "twenty million, one hundred two thousand, one hundred ninety-eight".