21082449752 has 64 divisors (see below), whose sum is σ = 49337164800. Its totient is φ = 8222820480.

The previous prime is 21082449721. The next prime is 21082449809. The reversal of 21082449752 is 25794428012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152252 + ... + 255627.

It is an arithmetic number, because the mean of its divisors is an integer number (770893200).

Almost surely, 2^21082449752 is an apocalyptic number.

It is an amenable number.

21082449752 is an abundant number, since it is smaller than the sum of its proper divisors (28254715048).

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

21082449752 is a wasteful number, since it uses less digits than its factorization.

21082449752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407976 (or 407972 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 21082449752 in words is "twenty-one billion, eighty-two million, four hundred forty-nine thousand, seven hundred fifty-two".