21034443012 has 144 divisors (see below), whose sum is σ = 57357048000. Its totient is φ = 5978016000.

The previous prime is 21034442987. The next prime is 21034443013.

21034443012 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21034443013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2782614 + ... + 2790162.

Almost surely, 2^21034443012 is an apocalyptic number.

21034443012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21034443012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28678524000).

21034443012 is an abundant number, since it is smaller than the sum of its proper divisors (36322604988).

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

21034443012 is a wasteful number, since it uses less digits than its factorization.

21034443012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7698 (or 7685 counting only the distinct ones).

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

The spelling of 21034443012 in words is "twenty-one billion, thirty-four million, four hundred forty-three thousand, twelve".