20198284 has 6 divisors (see below), whose sum is σ = 35347004. Its totient is φ = 10099140.

The previous prime is 20198279. The next prime is 20198287. The reversal of 20198284 is 48289102.

It is not an unprimeable number, because it can be changed into a prime (20198287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2524782 + ... + 2524789.

Almost surely, 2^20198284 is an apocalyptic number.

It is an amenable number.

20198284 is a deficient number, since it is larger than the sum of its proper divisors (15148720).

20198284 is a wasteful number, since it uses less digits than its factorization.

20198284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5049575 (or 5049573 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 20198284 is about 4494.2501042999. The cubic root of 20198284 is about 272.3358560315.

The spelling of 20198284 in words is "twenty million, one hundred ninety-eight thousand, two hundred eighty-four".