21213600655352 has 32 divisors (see below), whose sum is σ = 45467682849120. Its totient is φ = 9089549706240.

The previous prime is 21213600655333. The next prime is 21213600655397. The reversal of 21213600655352 is 25355600631212.

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 7 ways as a sum of consecutive naturals, for example, 41272133 + ... + 41782964.

It is an arithmetic number, because the mean of its divisors is an integer number (1420865089035).

Almost surely, 2^{21213600655352} is an apocalyptic number.

It is an amenable number.

21213600655352 is an abundant number, since it is smaller than the sum of its proper divisors (24254082193768).

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

21213600655352 is a wasteful number, since it uses less digits than its factorization.

21213600655352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83059671 (or 83059667 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 21213600655352 in words is "twenty-one trillion, two hundred thirteen billion, six hundred million, six hundred fifty-five thousand, three hundred fifty-two".