21210130984 has 96 divisors (see below), whose sum is σ = 48359894400. Its totient is φ = 8679242880.

The previous prime is 21210130927. The next prime is 21210131051. The reversal of 21210130984 is 48903101212.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5957797 + ... + 5961355.

It is an arithmetic number, because the mean of its divisors is an integer number (503748900).

Almost surely, 2^21210130984 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 21210130984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24179947200).

21210130984 is an abundant number, since it is smaller than the sum of its proper divisors (27149763416).

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

21210130984 is a wasteful number, since it uses less digits than its factorization.

21210130984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263 (or 4252 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 21210130984 in words is "twenty-one billion, two hundred ten million, one hundred thirty thousand, nine hundred eighty-four".