12003012320 has 96 divisors (see below), whose sum is σ = 30639536928. Its totient is φ = 4417210368.

The previous prime is 12003012319. The next prime is 12003012331. The reversal of 12003012320 is 2321030021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12003012295 and 12003012304.

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, 629162 + ... + 647958.

It is an arithmetic number, because the mean of its divisors is an integer number (319161843).

Almost surely, 2^12003012320 is an apocalyptic number.

12003012320 is a gapful number since it is divisible by the number (10) 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 12003012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15319768464).

12003012320 is an abundant number, since it is smaller than the sum of its proper divisors (18636524608).

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

12003012320 is a wasteful number, since it uses less digits than its factorization.

12003012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19132 (or 19124 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 12003012320 its reverse (2321030021), we get a palindrome (14324042341).

The spelling of 12003012320 in words is "twelve billion, three million, twelve thousand, three hundred twenty".