20323131312 has 160 divisors (see below), whose sum is σ = 58053427200. Its totient is φ = 6075336960.

The previous prime is 20323131277. The next prime is 20323131319. The reversal of 20323131312 is 21313132302.

It is not an unprimeable number, because it can be changed into a prime (20323131319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13343383 + ... + 13344905.

It is an arithmetic number, because the mean of its divisors is an integer number (362833920).

Almost surely, 2^20323131312 is an apocalyptic number.

20323131312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20323131312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29026713600).

20323131312 is an abundant number, since it is smaller than the sum of its proper divisors (37730295888).

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

20323131312 is a wasteful number, since it uses less digits than its factorization.

20323131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871 (or 1865 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20323131312 its reverse (21313132302), we get a palindrome (41636263614).

The spelling of 20323131312 in words is "twenty billion, three hundred twenty-three million, one hundred thirty-one thousand, three hundred twelve".