21046848872272 has 20 divisors (see below), whose sum is σ = 40815040030740. Its totient is φ = 10513935315968.

The previous prime is 21046848872213. The next prime is 21046848872279. The reversal of 21046848872272 is 27227884864012.

It can be written as a sum of positive squares in 2 ways, for example, as 5467534652176 + 15579314220096 = 2338276^2 + 3947064^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21046848872272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21046848872279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593051713 + ... + 593087200.

It is an arithmetic number, because the mean of its divisors is an integer number (2040752001537).

Almost surely, 2^{21046848872272} is an apocalyptic number.

It is an amenable number.

21046848872272 is a deficient number, since it is larger than the sum of its proper divisors (19768191158468).

21046848872272 is a wasteful number, since it uses less digits than its factorization.

21046848872272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186140030 (or 1186140024 counting only the distinct ones).

The product of its (nonzero) digits is 38535168, while the sum is 61.

The spelling of 21046848872272 in words is "twenty-one trillion, forty-six billion, eight hundred forty-eight million, eight hundred seventy-two thousand, two hundred seventy-two".