20002121204 has 24 divisors (see below), whose sum is σ = 38069546088. Its totient is φ = 9140342400.

The previous prime is 20002121203. The next prime is 20002121231. The reversal of 20002121204 is 40212120002.

It can be written as a sum of positive squares in 4 ways, for example, as 9273304804 + 10728816400 = 96298^2 + 103580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002121203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898987 + ... + 1909490.

It is an arithmetic number, because the mean of its divisors is an integer number (1586231087).

Almost surely, 2^20002121204 is an apocalyptic number.

It is an amenable number.

20002121204 is a deficient number, since it is larger than the sum of its proper divisors (18067424884).

20002121204 is a wasteful number, since it uses less digits than its factorization.

20002121204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808595 (or 3808593 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20002121204 its reverse (40212120002), we get a palindrome (60214241206).

The spelling of 20002121204 in words is "twenty billion, two million, one hundred twenty-one thousand, two hundred four".