12505832730 has 64 divisors (see below), whose sum is σ = 33360076800. Its totient is φ = 3333769920.

The previous prime is 12505832707. The next prime is 12505832741. The reversal of 12505832730 is 3723850521.

It is a happy number.

12505832730 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 583 + 2 + 73 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1079911 + ... + 1091429.

It is an arithmetic number, because the mean of its divisors is an integer number (521251200).

Almost surely, 2^12505832730 is an apocalyptic number.

12505832730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12505832730 is an abundant number, since it is smaller than the sum of its proper divisors (20854244070).

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

12505832730 is a wasteful number, since it uses less digits than its factorization.

12505832730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15556 (or 15550 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 12505832730 in words is "twelve billion, five hundred five million, eight hundred thirty-two thousand, seven hundred thirty".