20308198 has 16 divisors (see below), whose sum is σ = 30991680. Its totient is φ = 9979200.

The previous prime is 20308187. The next prime is 20308199. The reversal of 20308198 is 89180302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20308199) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48028 + ... + 48448.

It is an arithmetic number, because the mean of its divisors is an integer number (1936980).

Almost surely, 2^20308198 is an apocalyptic number.

20308198 is a deficient number, since it is larger than the sum of its proper divisors (10683482).

20308198 is a wasteful number, since it uses less digits than its factorization.

20308198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 20308198 is about 4506.4618050084. The cubic root of 20308198 is about 272.8289571604.

The spelling of 20308198 in words is "twenty million, three hundred eight thousand, one hundred ninety-eight".