20201616728512 has 112 divisors (see below), whose sum is σ = 41652408204288. Its totient is φ = 9714555002880.

The previous prime is 20201616728453. The next prime is 20201616728567. The reversal of 20201616728512 is 21582761610202.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 52126878 + ... + 52512994.

It is an arithmetic number, because the mean of its divisors is an integer number (371896501824).

Almost surely, 2^{20201616728512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201616728512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20826204102144).

20201616728512 is an abundant number, since it is smaller than the sum of its proper divisors (21450791475776).

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

20201616728512 is a wasteful number, since it uses less digits than its factorization.

20201616728512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386454 (or 386444 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 20201616728512 in words is "twenty trillion, two hundred one billion, six hundred sixteen million, seven hundred twenty-eight thousand, five hundred twelve".