12320444002 has 4 divisors (see below), whose sum is σ = 18480666006. Its totient is φ = 6160222000.

The previous prime is 12320443981. The next prime is 12320444009. The reversal of 12320444002 is 20044402321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20044402321 = 128677 ⋅155773.

It can be written as a sum of positive squares in only one way, i.e., 7682697801 + 4637746201 = 87651^2 + 68101^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12320444009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3080110999 + ... + 3080111002.

Almost surely, 2^12320444002 is an apocalyptic number.

12320444002 is a deficient number, since it is larger than the sum of its proper divisors (6160222004).

12320444002 is an equidigital number, since it uses as much as digits as its factorization.

12320444002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160222003.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 12320444002 its reverse (20044402321), we get a palindrome (32364846323).

The spelling of 12320444002 in words is "twelve billion, three hundred twenty million, four hundred forty-four thousand, two".