21744350 has 24 divisors (see below), whose sum is σ = 41434848. Its totient is φ = 8484800.

The previous prime is 21744347. The next prime is 21744397. The reversal of 21744350 is 5344712.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3254 + ... + 7353.

It is an arithmetic number, because the mean of its divisors is an integer number (1726452).

Almost surely, 2^21744350 is an apocalyptic number.

21744350 is a deficient number, since it is larger than the sum of its proper divisors (19690498).

21744350 is a wasteful number, since it uses less digits than its factorization.

21744350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10660 (or 10655 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 21744350 is about 4663.0837436186. The cubic root of 21744350 is about 279.1143358755.

The spelling of 21744350 in words is "twenty-one million, seven hundred forty-four thousand, three hundred fifty".