21440324014 has 16 divisors (see below), whose sum is σ = 33998449680. Its totient is φ = 10112351040.

The previous prime is 21440324011. The next prime is 21440324039. The reversal of 21440324014 is 41042304412.

It is a self number, because there is not a number n which added to its sum of digits gives 21440324014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440324011) 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, 1201917 + ... + 1219624.

It is an arithmetic number, because the mean of its divisors is an integer number (2124903105).

Almost surely, 2^21440324014 is an apocalyptic number.

21440324014 is a deficient number, since it is larger than the sum of its proper divisors (12558125666).

21440324014 is a wasteful number, since it uses less digits than its factorization.

21440324014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421795.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21440324014 its reverse (41042304412), we get a palindrome (62482628426).

The spelling of 21440324014 in words is "twenty-one billion, four hundred forty million, three hundred twenty-four thousand, fourteen".