20021204312 has 16 divisors (see below), whose sum is σ = 39171921840. Its totient is φ = 9575358496.

The previous prime is 20021204311. The next prime is 20021204327. The reversal of 20021204312 is 21340212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021204311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54405263 + ... + 54405630.

It is an arithmetic number, because the mean of its divisors is an integer number (2448245115).

Almost surely, 2^20021204312 is an apocalyptic number.

It is an amenable number.

20021204312 is a deficient number, since it is larger than the sum of its proper divisors (19150717528).

20021204312 is a wasteful number, since it uses less digits than its factorization.

20021204312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108810922 (or 108810918 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20021204312 its reverse (21340212002), we get a palindrome (41361416314).

The spelling of 20021204312 in words is "twenty billion, twenty-one million, two hundred four thousand, three hundred twelve".