21419224 has 16 divisors (see below), whose sum is σ = 40336920. Its totient is φ = 10662720.

The previous prime is 21419207. The next prime is 21419267. The reversal of 21419224 is 42291412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3882 + ... + 7609.

Almost surely, 2^21419224 is an apocalyptic number.

It is an amenable number.

21419224 is a deficient number, since it is larger than the sum of its proper divisors (18917696).

21419224 is a wasteful number, since it uses less digits than its factorization.

21419224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11730 (or 11726 counting only the distinct ones).

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

The square root of 21419224 is about 4628.0907510549. The cubic root of 21419224 is about 277.7162192242.

The spelling of 21419224 in words is "twenty-one million, four hundred nineteen thousand, two hundred twenty-four".