21743324 has 12 divisors (see below), whose sum is σ = 38587248. Its totient is φ = 10718400.

The previous prime is 21743317. The next prime is 21743341. The reversal of 21743324 is 42334712.

It is a junction number, because it is equal to n+sod(n) for n = 21743293 and 21743302.

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, 37997 + ... + 38564.

It is an arithmetic number, because the mean of its divisors is an integer number (3215604).

Almost surely, 2^21743324 is an apocalyptic number.

It is an amenable number.

21743324 is a deficient number, since it is larger than the sum of its proper divisors (16843924).

21743324 is a wasteful number, since it uses less digits than its factorization.

21743324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76636 (or 76634 counting only the distinct ones).

The product of its digits is 4032, while the sum is 26.

The square root of 21743324 is about 4662.9737292848. The cubic root of 21743324 is about 279.1099458338.

The spelling of 21743324 in words is "twenty-one million, seven hundred forty-three thousand, three hundred twenty-four".