21300248 has 16 divisors (see below), whose sum is σ = 40058280. Its totient is φ = 10618048.

The previous prime is 21300233. The next prime is 21300287. The reversal of 21300248 is 84200312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061 + ... + 6612.

Almost surely, 2^21300248 is an apocalyptic number.

It is an amenable number.

21300248 is a deficient number, since it is larger than the sum of its proper divisors (18758032).

21300248 is a wasteful number, since it uses less digits than its factorization.

21300248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8026 (or 8022 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21300248 is about 4615.2191713937. The cubic root of 21300248 is about 277.2010600016.

The spelling of 21300248 in words is "twenty-one million, three hundred thousand, two hundred forty-eight".