21345533112 has 32 divisors (see below), whose sum is σ = 53892193680. Its totient is φ = 7044729600.

The previous prime is 21345533101. The next prime is 21345533141. The reversal of 21345533112 is 21133554312.

It is a self number, because there is not a number n which added to its sum of digits gives 21345533112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4400533 + ... + 4405380.

Almost surely, 2^21345533112 is an apocalyptic number.

It is an amenable number.

21345533112 is an abundant number, since it is smaller than the sum of its proper divisors (32546660568).

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

21345533112 is a wasteful number, since it uses less digits than its factorization.

21345533112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8806023 (or 8806019 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The spelling of 21345533112 in words is "twenty-one billion, three hundred forty-five million, five hundred thirty-three thousand, one hundred twelve".