21433044012 has 96 divisors (see below), whose sum is σ = 54020440320. Its totient is φ = 6592078080.

The previous prime is 21433044001. The next prime is 21433044019. The reversal of 21433044012 is 21044033412.

It is a super-3 number, since 3×21433044012³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21433044019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3653962 + ... + 3659822.

It is an arithmetic number, because the mean of its divisors is an integer number (562712920).

Almost surely, 2^21433044012 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 21433044012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27010220160).

21433044012 is an abundant number, since it is smaller than the sum of its proper divisors (32587396308).

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

21433044012 is a wasteful number, since it uses less digits than its factorization.

21433044012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6303 (or 6301 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21433044012 its reverse (21044033412), we get a palindrome (42477077424).

The spelling of 21433044012 in words is "twenty-one billion, four hundred thirty-three million, forty-four thousand, twelve".