20123023312 has 80 divisors (see below), whose sum is σ = 45192107520. Its totient is φ = 8501901696.

The previous prime is 20123023279. The next prime is 20123023339. The reversal of 20123023312 is 21332032102.

It is a self number, because there is not a number n which added to its sum of digits gives 20123023312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4859739 + ... + 4863877.

It is an arithmetic number, because the mean of its divisors is an integer number (564901344).

Almost surely, 2^20123023312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123023312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22596053760).

20123023312 is an abundant number, since it is smaller than the sum of its proper divisors (25069084208).

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

20123023312 is a wasteful number, since it uses less digits than its factorization.

20123023312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760 (or 4754 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20123023312 its reverse (21332032102), we get a palindrome (41455055414).

The spelling of 20123023312 in words is "twenty billion, one hundred twenty-three million, twenty-three thousand, three hundred twelve".