21924333 has 6 divisors (see below), whose sum is σ = 31668494. Its totient is φ = 14616216.

The previous prime is 21924323. The next prime is 21924337. The reversal of 21924333 is 33342912.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11309769 + 10614564 = 3363^2 + 3258^2 .

It is not a de Polignac number, because 21924333 - 2¹⁸ = 21662189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21924297 and 21924306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21924337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1218010 + ... + 1218027.

Almost surely, 2^21924333 is an apocalyptic number.

It is an amenable number.

21924333 is a deficient number, since it is larger than the sum of its proper divisors (9744161).

21924333 is a wasteful number, since it uses less digits than its factorization.

21924333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436043 (or 2436040 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 21924333 is about 4682.3426828886. The cubic root of 21924333 is about 279.8823187439.

The spelling of 21924333 in words is "twenty-one million, nine hundred twenty-four thousand, three hundred thirty-three".