12820512850 has 24 divisors (see below), whose sum is σ = 24668437860. Its totient is φ = 4951369920.

The previous prime is 12820512797. The next prime is 12820512851. The reversal of 12820512850 is 5821502821.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1858213449 + 10962299401 = 43107^2 + 104701^2 .

It is not an unprimeable number, because it can be changed into a prime (12820512851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4419417 + ... + 4422316.

Almost surely, 2^12820512850 is an apocalyptic number.

12820512850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12820512850 is a deficient number, since it is larger than the sum of its proper divisors (11847925010).

12820512850 is a wasteful number, since it uses less digits than its factorization.

12820512850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841774 (or 8841769 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 34.

The spelling of 12820512850 in words is "twelve billion, eight hundred twenty million, five hundred twelve thousand, eight hundred fifty".