21338048 has 28 divisors (see below), whose sum is σ = 43491912. Its totient is φ = 10379520.

The previous prime is 21338039. The next prime is 21338059. The reversal of 21338048 is 84083312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21338048.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2138 + ... + 6873.

Almost surely, 2^21338048 is an apocalyptic number.

It is an amenable number.

21338048 is an abundant number, since it is smaller than the sum of its proper divisors (22153864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21338048 is an equidigital number, since it uses as much as digits as its factorization.

21338048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9060 (or 9050 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 21338048 is about 4619.3125029597. The cubic root of 21338048 is about 277.3649392809.

The spelling of 21338048 in words is "twenty-one million, three hundred thirty-eight thousand, forty-eight".