21844444812 has 24 divisors (see below), whose sum is σ = 50981841456. Its totient is φ = 7279843008.

The previous prime is 21844444801. The next prime is 21844444813.

21844444812 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21844444813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148663 + ... + 256494.

It is an arithmetic number, because the mean of its divisors is an integer number (2124243394).

Almost surely, 2^21844444812 is an apocalyptic number.

It is an amenable number.

21844444812 is an abundant number, since it is smaller than the sum of its proper divisors (29137396644).

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

21844444812 is a wasteful number, since it uses less digits than its factorization.

21844444812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409657 (or 409655 counting only the distinct ones).

The product of its digits is 262144, while the sum is 42.

The spelling of 21844444812 in words is "twenty-one billion, eight hundred forty-four million, four hundred forty-four thousand, eight hundred twelve".