21314442244 has 6 divisors (see below), whose sum is σ = 37300273934. Its totient is φ = 10657221120.

The previous prime is 21314442241. The next prime is 21314442251. The reversal of 21314442244 is 44224441312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15416202244 + 5898240000 = 124162^2 + 76800^2 .

It is not an unprimeable number, because it can be changed into a prime (21314442241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2664305277 + ... + 2664305284.

Almost surely, 2^21314442244 is an apocalyptic number.

It is an amenable number.

21314442244 is a deficient number, since it is larger than the sum of its proper divisors (15985831690).

21314442244 is a wasteful number, since it uses less digits than its factorization.

21314442244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328610565 (or 5328610563 counting only the distinct ones).

The product of its digits is 24576, while the sum is 31.

Adding to 21314442244 its reverse (44224441312), we get a palindrome (65538883556).

The spelling of 21314442244 in words is "twenty-one billion, three hundred fourteen million, four hundred forty-two thousand, two hundred forty-four".