12403304320 has 64 divisors (see below), whose sum is σ = 32347272240. Its totient is φ = 4510289920.

The previous prime is 12403304299. The next prime is 12403304351. The reversal of 12403304320 is 2340330421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12403304291 and 12403304300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873877 + ... + 887956.

Almost surely, 2^12403304320 is an apocalyptic number.

12403304320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12403304320 is an abundant number, since it is smaller than the sum of its proper divisors (19943967920).

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

12403304320 is a wasteful number, since it uses less digits than its factorization.

12403304320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761863 (or 1761851 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 12403304320 its reverse (2340330421), we get a palindrome (14743634741).

The spelling of 12403304320 in words is "twelve billion, four hundred three million, three hundred four thousand, three hundred twenty".