21924124 has 12 divisors (see below), whose sum is σ = 38478384. Its totient is φ = 10930304.

The previous prime is 21924113. The next prime is 21924127. The reversal of 21924124 is 42142912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21924127) 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 3 ways as a sum of consecutive naturals, for example, 6352 + ... + 9175.

It is an arithmetic number, because the mean of its divisors is an integer number (3206532).

Almost surely, 2^21924124 is an apocalyptic number.

It is an amenable number.

21924124 is a deficient number, since it is larger than the sum of its proper divisors (16554260).

21924124 is a wasteful number, since it uses less digits than its factorization.

21924124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15884 (or 15882 counting only the distinct ones).

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

The square root of 21924124 is about 4682.3203649473. The cubic root of 21924124 is about 279.8814293882.

The spelling of 21924124 in words is "twenty-one million, nine hundred twenty-four thousand, one hundred twenty-four".