21584248512 has 28 divisors (see below), whose sum is σ = 57108324696. Its totient is φ = 7194749440.

The previous prime is 21584248489. The next prime is 21584248549.

21584248512 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56208789 + ... + 56209172.

Almost surely, 2^21584248512 is an apocalyptic number.

It is an amenable number.

21584248512 is an abundant number, since it is smaller than the sum of its proper divisors (35524076184).

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

21584248512 is a wasteful number, since it uses less digits than its factorization.

21584248512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112417976 (or 112417966 counting only the distinct ones).

The product of its digits is 204800, while the sum is 42.

The spelling of 21584248512 in words is "twenty-one billion, five hundred eighty-four million, two hundred forty-eight thousand, five hundred twelve".