20558196 has 36 divisors (see below), whose sum is σ = 52852800. Its totient is φ = 6735888.

The previous prime is 20558191. The next prime is 20558207. The reversal of 20558196 is 69185502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20558196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20558191) 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 11 ways as a sum of consecutive naturals, for example, 2716 + ... + 6963.

Almost surely, 2^20558196 is an apocalyptic number.

It is an amenable number.

20558196 is an abundant number, since it is smaller than the sum of its proper divisors (32294604).

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

20558196 is a wasteful number, since it uses less digits than its factorization.

20558196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9748 (or 9743 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 20558196 is about 4534.1146875658. The cubic root of 20558196 is about 273.9439208939.

The spelling of 20558196 in words is "twenty million, five hundred fifty-eight thousand, one hundred ninety-six".