20684909576384 has 56 divisors (see below), whose sum is σ = 41924347716288. Its totient is φ = 10121340579840.

The previous prime is 20684909576369. The next prime is 20684909576393. The reversal of 20684909576384 is 48367590948602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28704392 + ... + 29416184.

Almost surely, 2^{20684909576384} is an apocalyptic number.

It is an amenable number.

20684909576384 is an abundant number, since it is smaller than the sum of its proper divisors (21239438139904).

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

20684909576384 is an equidigital number, since it uses as much as digits as its factorization.

20684909576384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721513 (or 721503 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 71.

The spelling of 20684909576384 in words is "twenty trillion, six hundred eighty-four billion, nine hundred nine million, five hundred seventy-six thousand, three hundred eighty-four".