21944014 has 16 divisors (see below), whose sum is σ = 33715440. Its totient is φ = 10707840.

The previous prime is 21944011. The next prime is 21944017. The reversal of 21944014 is 41044912.

It is an interprime number because it is at equal distance from previous prime (21944011) and next prime (21944017).

It is a self number, because there is not a number n which added to its sum of digits gives 21944014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21944011) 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, 25117 + ... + 25975.

It is an arithmetic number, because the mean of its divisors is an integer number (2107215).

Almost surely, 2^21944014 is an apocalyptic number.

21944014 is a deficient number, since it is larger than the sum of its proper divisors (11771426).

21944014 is a wasteful number, since it uses less digits than its factorization.

21944014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 21944014 is about 4684.4438303816. The cubic root of 21944014 is about 279.9660418001.

Adding to 21944014 its reverse (41044912), we get a palindrome (62988926).

The spelling of 21944014 in words is "twenty-one million, nine hundred forty-four thousand, fourteen".