21362008 has 16 divisors (see below), whose sum is σ = 40148280. Its totient is φ = 10655808.

The previous prime is 21361957. The next prime is 21362041. The reversal of 21362008 is 80026312.

It is a self number, because there is not a number n which added to its sum of digits gives 21362008.

It is a congruent number.

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, 735 + ... + 6577.

Almost surely, 2^21362008 is an apocalyptic number.

It is an amenable number.

21362008 is a deficient number, since it is larger than the sum of its proper divisors (18786272).

21362008 is a wasteful number, since it uses less digits than its factorization.

21362008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306 (or 6302 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21362008 is about 4621.9052348572. The cubic root of 21362008 is about 277.4687160037.

The spelling of 21362008 in words is "twenty-one million, three hundred sixty-two thousand, eight".