21746348 has 12 divisors (see below), whose sum is σ = 40983600. Its totient is φ = 10036752.

The previous prime is 21746327. The next prime is 21746363. The reversal of 21746348 is 84364712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209048 + ... + 209151.

It is an arithmetic number, because the mean of its divisors is an integer number (3415300).

Almost surely, 2^21746348 is an apocalyptic number.

It is an amenable number.

21746348 is a deficient number, since it is larger than the sum of its proper divisors (19237252).

21746348 is a wasteful number, since it uses less digits than its factorization.

21746348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418216 (or 418214 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 21746348 is about 4663.2979746098. The cubic root of 21746348 is about 279.1228845079.

The spelling of 21746348 in words is "twenty-one million, seven hundred forty-six thousand, three hundred forty-eight".