21030848 has 28 divisors (see below), whose sum is σ = 42425112. Its totient is φ = 10341120.

The previous prime is 21030797. The next prime is 21030857. The reversal of 21030848 is 84803012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211 + ... + 6597.

Almost surely, 2^21030848 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 21030848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21212556).

21030848 is an abundant number, since it is smaller than the sum of its proper divisors (21394264).

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

21030848 is an equidigital number, since it uses as much as digits as its factorization.

21030848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460 (or 5450 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 21030848 is about 4585.9402525545. The cubic root of 21030848 is about 276.0274424859.

The spelling of 21030848 in words is "twenty-one million, thirty thousand, eight hundred forty-eight".