20004212 has 6 divisors (see below), whose sum is σ = 35007378. Its totient is φ = 10002104.

The previous prime is 20004211. The next prime is 20004217. The reversal of 20004212 is 21240002.

It can be written as a sum of positive squares in only one way, i.e., 19589476 + 414736 = 4426^2 + 644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20004193 and 20004202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004211) 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 as a sum of consecutive naturals, namely, 2500523 + ... + 2500530.

It is an arithmetic number, because the mean of its divisors is an integer number (5834563).

Almost surely, 2^20004212 is an apocalyptic number.

It is an amenable number.

20004212 is a deficient number, since it is larger than the sum of its proper divisors (15003166).

20004212 is a wasteful number, since it uses less digits than its factorization.

20004212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001057 (or 5001055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20004212 is about 4472.6068461245. The cubic root of 20004212 is about 271.4608155336.

Adding to 20004212 its reverse (21240002), we get a palindrome (41244214).

The spelling of 20004212 in words is "twenty million, four thousand, two hundred twelve".