21522532032 has 140 divisors (see below), whose sum is σ = 67552717320. Its totient is φ = 6752139264.

The previous prime is 21522532021. The next prime is 21522532051. The reversal of 21522532032 is 23023522512.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21522531987 and 21522532005.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33982 + ... + 210237.

Almost surely, 2^21522532032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21522532032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33776358660).

21522532032 is an abundant number, since it is smaller than the sum of its proper divisors (46030185288).

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

21522532032 is a wasteful number, since it uses less digits than its factorization.

21522532032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244260 (or 244241 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 21522532032 in words is "twenty-one billion, five hundred twenty-two million, five hundred thirty-two thousand, thirty-two".