12305405320 has 64 divisors (see below), whose sum is σ = 29848875840. Its totient is φ = 4538668800.

The previous prime is 12305405311. The next prime is 12305405339. The reversal of 12305405320 is 2350450321.

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, 492735 + ... + 517105.

It is an arithmetic number, because the mean of its divisors is an integer number (466388685).

Almost surely, 2^12305405320 is an apocalyptic number.

12305405320 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 12305405320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14924437920).

12305405320 is an abundant number, since it is smaller than the sum of its proper divisors (17543470520).

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

12305405320 is a wasteful number, since it uses less digits than its factorization.

12305405320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25366 (or 25362 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 12305405320 its reverse (2350450321), we get a palindrome (14655855641).

The spelling of 12305405320 in words is "twelve billion, three hundred five million, four hundred five thousand, three hundred twenty".