21044440214 has 8 divisors (see below), whose sum is σ = 36076183248. Its totient is φ = 9019045800.

The previous prime is 21044440213. The next prime is 21044440217. The reversal of 21044440214 is 41204444012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044440211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751587137 + ... + 751587164.

It is an arithmetic number, because the mean of its divisors is an integer number (4509522906).

Almost surely, 2^21044440214 is an apocalyptic number.

21044440214 is a deficient number, since it is larger than the sum of its proper divisors (15031743034).

21044440214 is a wasteful number, since it uses less digits than its factorization.

21044440214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503174310.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 21044440214 its reverse (41204444012), we get a palindrome (62248884226).

The spelling of 21044440214 in words is "twenty-one billion, forty-four million, four hundred forty thousand, two hundred fourteen".