21052247464000 has 112 divisors (see below), whose sum is σ = 52160284468656. Its totient is φ = 8416958976000.

The previous prime is 21052247463901. The next prime is 21052247464043. The reversal of 21052247464000 is 46474225012.

It can be written as a sum of positive squares in 8 ways, for example, as 310489670656 + 20741757793344 = 557216^2 + 4554312^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16513444 + ... + 17742556.

It is an arithmetic number, because the mean of its divisors is an integer number (465716825613).

Almost surely, 2^{21052247464000} is an apocalyptic number.

21052247464000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21052247464000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26080142234328).

21052247464000 is an abundant number, since it is smaller than the sum of its proper divisors (31108037004656).

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

21052247464000 is a wasteful number, since it uses less digits than its factorization.

21052247464000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231281 (or 1231261 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 37.

The spelling of 21052247464000 in words is "twenty-one trillion, fifty-two billion, two hundred forty-seven million, four hundred sixty-four thousand".