12036643020 has 72 divisors (see below), whose sum is σ = 36921437280. Its totient is φ = 3173702400.

The previous prime is 12036643007. The next prime is 12036643027. The reversal of 12036643020 is 2034663021.

12036643020 is a `hidden beast` number, since 1 + 203 + 6 + 6 + 430 + 20 = 666.

It is not an unprimeable number, because it can be changed into a prime (12036643027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359656 + ... + 391695.

It is an arithmetic number, because the mean of its divisors is an integer number (512797740).

Almost surely, 2^12036643020 is an apocalyptic number.

12036643020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12036643020 is an abundant number, since it is smaller than the sum of its proper divisors (24884794260).

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

12036643020 is a wasteful number, since it uses less digits than its factorization.

12036643020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751455 (or 751450 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The spelling of 12036643020 in words is "twelve billion, thirty-six million, six hundred forty-three thousand, twenty".