21444244412 has 12 divisors (see below), whose sum is σ = 37544400936. Its totient is φ = 10717272720.

The previous prime is 21444244411. The next prime is 21444244427.

21444244412 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444244411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202414 + ... + 1220117.

It is an arithmetic number, because the mean of its divisors is an integer number (3128700078).

Almost surely, 2^21444244412 is an apocalyptic number.

It is an amenable number.

21444244412 is a deficient number, since it is larger than the sum of its proper divisors (16100156524).

21444244412 is a wasteful number, since it uses less digits than its factorization.

21444244412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424748 (or 2424746 counting only the distinct ones).

The product of its digits is 32768, while the sum is 32.

The spelling of 21444244412 in words is "twenty-one billion, four hundred forty-four million, two hundred forty-four thousand, four hundred twelve".