21283324 has 12 divisors (see below), whose sum is σ = 37576224. Its totient is φ = 10547264.

The previous prime is 21283319. The next prime is 21283331. The reversal of 21283324 is 42338212.

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, 23092 + ... + 23995.

It is an arithmetic number, because the mean of its divisors is an integer number (3131352).

Almost surely, 2^21283324 is an apocalyptic number.

It is an amenable number.

21283324 is a deficient number, since it is larger than the sum of its proper divisors (16292900).

21283324 is a wasteful number, since it uses less digits than its factorization.

21283324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47204 (or 47202 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 21283324 is about 4613.3853079924. The cubic root of 21283324 is about 277.1276243342.

The spelling of 21283324 in words is "twenty-one million, two hundred eighty-three thousand, three hundred twenty-four".