9821213632 has 28 divisors (see below), whose sum is σ = 19819299960. Its totient is φ = 4827374336.

The previous prime is 9821213627. The next prime is 9821213651. The reversal of 9821213632 is 2363121289.

It is a junction number, because it is equal to n+sod(n) for n = 9821213591 and 9821213600.

It is a congruent number.

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, 1296703 + ... + 1304254.

Almost surely, 2^9821213632 is an apocalyptic number.

It is an amenable number.

9821213632 is an abundant number, since it is smaller than the sum of its proper divisors (9998086328).

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

9821213632 is a wasteful number, since it uses less digits than its factorization.

9821213632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601028 (or 2601018 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 9821213632 is about 99102.0364674712. The cubic root of 9821213632 is about 2141.5179517631.

The spelling of 9821213632 in words is "nine billion, eight hundred twenty-one million, two hundred thirteen thousand, six hundred thirty-two".