20311321108 has 36 divisors (see below), whose sum is σ = 38505015360. Its totient is φ = 9370641696.

The previous prime is 20311321087. The next prime is 20311321127. The reversal of 20311321108 is 80112311302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2298723 + ... + 2307541.

It is an arithmetic number, because the mean of its divisors is an integer number (1069583760).

Almost surely, 2^20311321108 is an apocalyptic number.

It is an amenable number.

20311321108 is a deficient number, since it is larger than the sum of its proper divisors (18193694252).

20311321108 is a wasteful number, since it uses less digits than its factorization.

20311321108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12256 (or 12241 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 20311321108 in words is "twenty billion, three hundred eleven million, three hundred twenty-one thousand, one hundred eight".