21048841520356 has 12 divisors (see below), whose sum is σ = 39668970557692. Its totient is φ = 9714849932448.

The previous prime is 21048841520353. The next prime is 21048841520429. The reversal of 21048841520356 is 65302514884012.

It can be written as a sum of positive squares in 2 ways, for example, as 2597950817856 + 18450890702500 = 1611816^2 + 4295450^2 .

It is not an unprimeable number, because it can be changed into a prime (21048841520353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202392706875 + ... + 202392706978.

Almost surely, 2^{21048841520356} is an apocalyptic number.

21048841520356 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21048841520356 is a deficient number, since it is larger than the sum of its proper divisors (18620129037336).

21048841520356 is a wasteful number, since it uses less digits than its factorization.

21048841520356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404785413870 (or 404785413868 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 49.

The spelling of 21048841520356 in words is "twenty-one trillion, forty-eight billion, eight hundred forty-one million, five hundred twenty thousand, three hundred fifty-six".