20312223312 has 40 divisors (see below), whose sum is σ = 54754691904. Its totient is φ = 6476360704.

The previous prime is 20312223311. The next prime is 20312223331. The reversal of 20312223312 is 21332221302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312223311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9198273 + ... + 9200480.

Almost surely, 2^20312223312 is an apocalyptic number.

It is an amenable number.

20312223312 is an abundant number, since it is smaller than the sum of its proper divisors (34442468592).

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

20312223312 is a wasteful number, since it uses less digits than its factorization.

20312223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18398787 (or 18398781 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20312223312 its reverse (21332221302), we get a palindrome (41644444614).

The spelling of 20312223312 in words is "twenty billion, three hundred twelve million, two hundred twenty-three thousand, three hundred twelve".