20204212 has 48 divisors (see below), whose sum is σ = 42658560. Its totient is φ = 8186112.

The previous prime is 20204209. The next prime is 20204221. The reversal of 20204212 is 21240202.

It is a junction number, because it is equal to n+sod(n) for n = 20204192 and 20204201.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 88114 + ... + 88342.

It is an arithmetic number, because the mean of its divisors is an integer number (888720).

Almost surely, 2^20204212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20204212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21329280).

20204212 is an abundant number, since it is smaller than the sum of its proper divisors (22454348).

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

20204212 is a wasteful number, since it uses less digits than its factorization.

20204212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20204212 is about 4494.9095652749. The cubic root of 20204212 is about 272.3624960676.

Adding to 20204212 its reverse (21240202), we get a palindrome (41444414).

The spelling of 20204212 in words is "twenty million, two hundred four thousand, two hundred twelve".