12509821960 has 64 divisors (see below), whose sum is σ = 29820960000. Its totient is φ = 4706712576.

The previous prime is 12509821949. The next prime is 12509821967. The reversal of 12509821960 is 6912890521.

It is not an unprimeable number, because it can be changed into a prime (12509821967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1354719 + ... + 1363921.

It is an arithmetic number, because the mean of its divisors is an integer number (465952500).

Almost surely, 2^12509821960 is an apocalyptic number.

12509821960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12509821960 is an abundant number, since it is smaller than the sum of its proper divisors (17311138040).

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

12509821960 is a wasteful number, since it uses less digits than its factorization.

12509821960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11230 (or 11226 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 12509821960 in words is "twelve billion, five hundred nine million, eight hundred twenty-one thousand, nine hundred sixty".