21026048 has 36 divisors (see below), whose sum is σ = 43807008. Its totient is φ = 10053120.

The previous prime is 21025987. The next prime is 21026053. The reversal of 21026048 is 84062012.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 4103 + ... + 7673.

Almost surely, 2^21026048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21026048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21903504).

21026048 is an abundant number, since it is smaller than the sum of its proper divisors (22780960).

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

21026048 is an equidigital number, since it uses as much as digits as its factorization.

21026048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610 (or 3596 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 21026048 is about 4585.4168839921. The cubic root of 21026048 is about 276.0064410735.

The spelling of 21026048 in words is "twenty-one million, twenty-six thousand, forty-eight".