12051720684 has 36 divisors (see below), whose sum is σ = 30469894000. Its totient is φ = 4016472480.

The previous prime is 12051720661. The next prime is 12051720749. The reversal of 12051720684 is 48602715021.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177849 + ... + 236079.

Almost surely, 2^12051720684 is an apocalyptic number.

It is an amenable number.

12051720684 is an abundant number, since it is smaller than the sum of its proper divisors (18418173316).

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

12051720684 is a wasteful number, since it uses less digits than its factorization.

12051720684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63990 (or 63985 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 12051720684 in words is "twelve billion, fifty-one million, seven hundred twenty thousand, six hundred eighty-four".