21114044 has 12 divisors (see below), whose sum is σ = 42228144. Its totient is φ = 9048864.

The previous prime is 21114043. The next prime is 21114047. The reversal of 21114044 is 44041112.

21114044 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377009 + ... + 377064.

It is an arithmetic number, because the mean of its divisors is an integer number (3519012).

Almost surely, 2^21114044 is an apocalyptic number.

It is an amenable number.

21114044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21114044 is a wasteful number, since it uses less digits than its factorization.

21114044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754084 (or 754082 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 21114044 is about 4595.0020674642. The cubic root of 21114044 is about 276.3909428681.

Adding to 21114044 its reverse (44041112), we get a palindrome (65155156).

The spelling of 21114044 in words is "twenty-one million, one hundred fourteen thousand, forty-four".