20001220204 has 12 divisors (see below), whose sum is σ = 40002440464. Its totient is φ = 8571951504.

The previous prime is 20001220153. The next prime is 20001220207. The reversal of 20001220204 is 40202210002.

20001220204 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20001220207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357164619 + ... + 357164674.

Almost surely, 2^20001220204 is an apocalyptic number.

It is an amenable number.

20001220204 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20001220204 is a wasteful number, since it uses less digits than its factorization.

20001220204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714329304 (or 714329302 counting only the distinct ones).

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

Adding to 20001220204 its reverse (40202210002), we get a palindrome (60203430206).

The spelling of 20001220204 in words is "twenty billion, one million, two hundred twenty thousand, two hundred four".