21241912 has 16 divisors (see below), whose sum is σ = 40134600. Its totient is φ = 10539360.

The previous prime is 21241901. The next prime is 21241921. The reversal of 21241912 is 21914212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9087 + ... + 11182.

Almost surely, 2^21241912 is an apocalyptic number.

It is an amenable number.

21241912 is a deficient number, since it is larger than the sum of its proper divisors (18892688).

21241912 is a wasteful number, since it uses less digits than its factorization.

21241912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20406 (or 20402 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 21241912 is about 4608.8948783846. The cubic root of 21241912 is about 276.9477673933.

It can be divided in two parts, 212 and 41912, that added together give a palindrome (42124).

The spelling of 21241912 in words is "twenty-one million, two hundred forty-one thousand, nine hundred twelve".