21444014 has 16 divisors (see below), whose sum is σ = 33050160. Its totient is φ = 10429440.

The previous prime is 21444011. The next prime is 21444019. The reversal of 21444014 is 41044412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444011) 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, 33134 + ... + 33774.

It is an arithmetic number, because the mean of its divisors is an integer number (2065635).

Almost surely, 2^21444014 is an apocalyptic number.

21444014 is a deficient number, since it is larger than the sum of its proper divisors (11606146).

21444014 is a wasteful number, since it uses less digits than its factorization.

21444014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 21444014 is about 4630.7681868131. The cubic root of 21444014 is about 277.8233181986.

Adding to 21444014 its reverse (41044412), we get a palindrome (62488426).

The spelling of 21444014 in words is "twenty-one million, four hundred forty-four thousand, fourteen".