21744444712 has 8 divisors (see below), whose sum is σ = 40770833850. Its totient is φ = 10872222352.

The previous prime is 21744444671. The next prime is 21744444713.

It is a happy number.

21744444712 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 15993649156 + 5750795556 = 126466^2 + 75834^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21744444713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1359027787 + ... + 1359027802.

Almost surely, 2^21744444712 is an apocalyptic number.

It is an amenable number.

21744444712 is a deficient number, since it is larger than the sum of its proper divisors (19026389138).

21744444712 is a wasteful number, since it uses less digits than its factorization.

21744444712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718055595 (or 2718055591 counting only the distinct ones).

The product of its digits is 200704, while the sum is 40.

The spelling of 21744444712 in words is "twenty-one billion, seven hundred forty-four million, four hundred forty-four thousand, seven hundred twelve".