21560605056052 has 12 divisors (see below), whose sum is σ = 37922587066980. Its totient is φ = 10725580179776.

The previous prime is 21560605056031. The next prime is 21560605056119. The reversal of 21560605056052 is 25065050606512.

It can be written as a sum of positive squares in 2 ways, for example, as 21171832853796 + 388772202256 = 4601286^2 + 623516^2 .

It is a congruent number.

It is an unprimeable number.

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, 13680586177 + ... + 13680587752.

It is an arithmetic number, because the mean of its divisors is an integer number (3160215588915).

Almost surely, 2^{21560605056052} is an apocalyptic number.

It is an amenable number.

21560605056052 is a deficient number, since it is larger than the sum of its proper divisors (16361982010928).

21560605056052 is a wasteful number, since it uses less digits than its factorization.

21560605056052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27361174130 (or 27361174128 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 21560605056052 in words is "twenty-one trillion, five hundred sixty billion, six hundred five million, fifty-six thousand, fifty-two".