12013233320 has 160 divisors (see below), whose sum is σ = 30247122600. Its totient is φ = 4293273600.

The previous prime is 12013233319. The next prime is 12013233329. The reversal of 12013233320 is 2333231021.

It can be written as a sum of positive squares in 4 ways, for example, as 10677915556 + 1335317764 = 103334^2 + 36542^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12013233292 and 12013233301.

It is not an unprimeable number, because it can be changed into a prime (12013233329) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42751580 + ... + 42751860.

Almost surely, 2^12013233320 is an apocalyptic number.

12013233320 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 12013233320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15123561300).

12013233320 is an abundant number, since it is smaller than the sum of its proper divisors (18233889280).

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

12013233320 is an equidigital number, since it uses as much as digits as its factorization.

12013233320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 12013233320 its reverse (2333231021), we get a palindrome (14346464341).

The spelling of 12013233320 in words is "twelve billion, thirteen million, two hundred thirty-three thousand, three hundred twenty".