21582872088 has 32 divisors (see below), whose sum is σ = 53975280960. Its totient is φ = 7191877280.

The previous prime is 21582872083. The next prime is 21582872117. The reversal of 21582872088 is 88027828512.

It is a self number, because there is not a number n which added to its sum of digits gives 21582872088.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21582872083) 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, 77070 + ... + 221597.

It is an arithmetic number, because the mean of its divisors is an integer number (1686727530).

Almost surely, 2^21582872088 is an apocalyptic number.

It is an amenable number.

21582872088 is an abundant number, since it is smaller than the sum of its proper divisors (32392408872).

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

21582872088 is a wasteful number, since it uses less digits than its factorization.

21582872088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301687 (or 301683 counting only the distinct ones).

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

The spelling of 21582872088 in words is "twenty-one billion, five hundred eighty-two million, eight hundred seventy-two thousand, eighty-eight".