21088828752 has 40 divisors (see below), whose sum is σ = 54492601536. Its totient is φ = 7027915776.

The previous prime is 21088828723. The next prime is 21088828753. The reversal of 21088828752 is 25782888012.

It is a junction number, because it is equal to n+sod(n) for n = 21088828695 and 21088828704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21088828753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156928 + ... + 258464.

Almost surely, 2^21088828752 is an apocalyptic number.

It is an amenable number.

21088828752 is an abundant number, since it is smaller than the sum of its proper divisors (33403772784).

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

21088828752 is a wasteful number, since it uses less digits than its factorization.

21088828752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105875 (or 105869 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 51.

The spelling of 21088828752 in words is "twenty-one billion, eighty-eight million, eight hundred twenty-eight thousand, seven hundred fifty-two".