21593007365216 has 24 divisors (see below), whose sum is σ = 48584266572240. Its totient is φ = 9254146013568.

The previous prime is 21593007365197. The next prime is 21593007365221. The reversal of 21593007365216 is 61256370039512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48198676931 + ... + 48198677378.

It is an arithmetic number, because the mean of its divisors is an integer number (2024344440510).

Almost surely, 2^{21593007365216} is an apocalyptic number.

It is an amenable number.

21593007365216 is an abundant number, since it is smaller than the sum of its proper divisors (26991259207024).

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

21593007365216 is an equidigital number, since it uses as much as digits as its factorization.

21593007365216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96397354326 (or 96397354318 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 50.

The spelling of 21593007365216 in words is "twenty-one trillion, five hundred ninety-three billion, seven million, three hundred sixty-five thousand, two hundred sixteen".