20321133212 has 12 divisors (see below), whose sum is σ = 35714611296. Its totient is φ = 10116958560.

The previous prime is 20321133211. The next prime is 20321133263. The reversal of 20321133212 is 21233112302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321133211) 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, 10900964 + ... + 10902827.

It is an arithmetic number, because the mean of its divisors is an integer number (2976217608).

Almost surely, 2^20321133212 is an apocalyptic number.

It is an amenable number.

20321133212 is a deficient number, since it is larger than the sum of its proper divisors (15393478084).

20321133212 is a wasteful number, since it uses less digits than its factorization.

20321133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21804028 (or 21804026 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20321133212 its reverse (21233112302), we get a palindrome (41554245514).

The spelling of 20321133212 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-three thousand, two hundred twelve".