21585502632 has 32 divisors (see below), whose sum is σ = 54016159680. Its totient is φ = 7188180480.

The previous prime is 21585502613. The next prime is 21585502649. The reversal of 21585502632 is 23620558512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411433 + ... + 460920.

It is an arithmetic number, because the mean of its divisors is an integer number (1688004990).

Almost surely, 2^21585502632 is an apocalyptic number.

It is an amenable number.

21585502632 is an abundant number, since it is smaller than the sum of its proper divisors (32430657048).

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

21585502632 is a wasteful number, since it uses less digits than its factorization.

21585502632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873393 (or 873389 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 21585502632 in words is "twenty-one billion, five hundred eighty-five million, five hundred two thousand, six hundred thirty-two".