21924233 has 8 divisors (see below), whose sum is σ = 23128320. Its totient is φ = 20725200.

The previous prime is 21924211. The next prime is 21924241. The reversal of 21924233 is 33242912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21924233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21924433) 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 7 ways as a sum of consecutive naturals, for example, 10583 + ... + 12483.

It is an arithmetic number, because the mean of its divisors is an integer number (2891040).

Almost surely, 2^21924233 is an apocalyptic number.

It is an amenable number.

21924233 is a deficient number, since it is larger than the sum of its proper divisors (1204087).

21924233 is a wasteful number, since it uses less digits than its factorization.

21924233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527.

The product of its digits is 2592, while the sum is 26.

The square root of 21924233 is about 4682.3320044610. The cubic root of 21924233 is about 279.8818932156.

The spelling of 21924233 in words is "twenty-one million, nine hundred twenty-four thousand, two hundred thirty-three".