20321136212 has 12 divisors (see below), whose sum is σ = 38297526036. Its totient is φ = 9378985920.

The previous prime is 20321136191. The next prime is 20321136221. The reversal of 20321136212 is 21263112302.

It can be written as a sum of positive squares in 2 ways, for example, as 948393616 + 19372742596 = 30796^2 + 139186^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195395489 + ... + 195395592.

It is an arithmetic number, because the mean of its divisors is an integer number (3191460503).

Almost surely, 2^20321136212 is an apocalyptic number.

It is an amenable number.

20321136212 is a deficient number, since it is larger than the sum of its proper divisors (17976389824).

20321136212 is a wasteful number, since it uses less digits than its factorization.

20321136212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390791098 (or 390791096 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20321136212 its reverse (21263112302), we get a palindrome (41584248514).

The spelling of 20321136212 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-six thousand, two hundred twelve".