21384727520312 has 64 divisors (see below), whose sum is σ = 43301027952000. Its totient is φ = 9842389501824.

The previous prime is 21384727520239. The next prime is 21384727520353. The reversal of 21384727520312 is 21302572748312.

It is a happy number.

It is a super-2 number, since 2×21384727520312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 110542823 + ... + 110736105.

It is an arithmetic number, because the mean of its divisors is an integer number (676578561750).

Almost surely, 2^{21384727520312} is an apocalyptic number.

It is an amenable number.

21384727520312 is an abundant number, since it is smaller than the sum of its proper divisors (21916300431688).

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

21384727520312 is a wasteful number, since it uses less digits than its factorization.

21384727520312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196260 (or 196256 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 21384727520312 in words is "twenty-one trillion, three hundred eighty-four billion, seven hundred twenty-seven million, five hundred twenty thousand, three hundred twelve".