21212832584 has 32 divisors (see below), whose sum is σ = 40789980000. Its totient is φ = 10336607232.

The previous prime is 21212832581. The next prime is 21212832607. The reversal of 21212832584 is 48523821212.

It is not an unprimeable number, because it can be changed into a prime (21212832581) by changing a digit.

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, 85787 + ... + 223125.

It is an arithmetic number, because the mean of its divisors is an integer number (1274686875).

Almost surely, 2^21212832584 is an apocalyptic number.

It is an amenable number.

21212832584 is a deficient number, since it is larger than the sum of its proper divisors (19577147416).

21212832584 is a wasteful number, since it uses less digits than its factorization.

21212832584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137837 (or 137833 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The spelling of 21212832584 in words is "twenty-one billion, two hundred twelve million, eight hundred thirty-two thousand, five hundred eighty-four".