12002320404 has 72 divisors (see below), whose sum is σ = 30866150952. Its totient is φ = 3931683840.

The previous prime is 12002320357. The next prime is 12002320409. The reversal of 12002320404 is 40402320021.

It can be written as a sum of positive squares in 4 ways, for example, as 3991712400 + 8010608004 = 63180^2 + 89502^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002320409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 730342 + ... + 746594.

It is an arithmetic number, because the mean of its divisors is an integer number (428696541).

Almost surely, 2^12002320404 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 12002320404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15433075476).

12002320404 is an abundant number, since it is smaller than the sum of its proper divisors (18863830548).

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

12002320404 is a wasteful number, since it uses less digits than its factorization.

12002320404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16617 (or 16612 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 12002320404 its reverse (40402320021), we get a palindrome (52404640425).

The spelling of 12002320404 in words is "twelve billion, two million, three hundred twenty thousand, four hundred four".