21652821500512 has 48 divisors (see below), whose sum is σ = 43658199501840. Its totient is φ = 10565461573632.

The previous prime is 21652821500509. The next prime is 21652821500521. The reversal of 21652821500512 is 21500512825612.

It is a congruent number.

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, 5237437 + ... + 8410492.

It is an arithmetic number, because the mean of its divisors is an integer number (909545822955).

Almost surely, 2^{21652821500512} is an apocalyptic number.

It is an amenable number.

21652821500512 is an abundant number, since it is smaller than the sum of its proper divisors (22005378001328).

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

21652821500512 is a wasteful number, since it uses less digits than its factorization.

21652821500512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13649135 (or 13649127 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 21652821500512 in words is "twenty-one trillion, six hundred fifty-two billion, eight hundred twenty-one million, five hundred thousand, five hundred twelve".