21075589752 has 64 divisors (see below), whose sum is σ = 60251162880. Its totient is φ = 6018077952.

The previous prime is 21075589687. The next prime is 21075589763. The reversal of 21075589752 is 25798557012.

It is a junction number, because it is equal to n+sod(n) for n = 21075589695 and 21075589704.

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, 258723 + ... + 330285.

It is an arithmetic number, because the mean of its divisors is an integer number (941424420).

Almost surely, 2^21075589752 is an apocalyptic number.

It is an amenable number.

21075589752 is an abundant number, since it is smaller than the sum of its proper divisors (39175573128).

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

21075589752 is a wasteful number, since it uses less digits than its factorization.

21075589752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73332 (or 73328 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 51.

The spelling of 21075589752 in words is "twenty-one billion, seventy-five million, five hundred eighty-nine thousand, seven hundred fifty-two".