21085752988096 has 56 divisors (see below), whose sum is σ = 43297045740000. Its totient is φ = 10176465675264.

The previous prime is 21085752988057. The next prime is 21085752988099. The reversal of 21085752988096 is 69088925758012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21085752988099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5009430 + ... + 8201578.

Almost surely, 2^{21085752988096} 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 21085752988096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21648522870000).

21085752988096 is an abundant number, since it is smaller than the sum of its proper divisors (22211292751904).

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

21085752988096 is a wasteful number, since it uses less digits than its factorization.

21085752988096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195749 (or 3195739 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 70.

The spelling of 21085752988096 in words is "twenty-one trillion, eighty-five billion, seven hundred fifty-two million, nine hundred eighty-eight thousand, ninety-six".