21103848 has 64 divisors (see below), whose sum is σ = 60076800. Its totient is φ = 6860160.

The previous prime is 21103847. The next prime is 21103879. The reversal of 21103848 is 84830112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21103843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7665 + ... + 10047.

It is an arithmetic number, because the mean of its divisors is an integer number (938700).

Almost surely, 2^21103848 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 21103848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30038400).

21103848 is an abundant number, since it is smaller than the sum of its proper divisors (38972952).

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

21103848 is a wasteful number, since it uses less digits than its factorization.

21103848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439 (or 2429 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 21103848 is about 4593.8924671786. The cubic root of 21103848 is about 276.3464458532.

The spelling of 21103848 in words is "twenty-one million, one hundred three thousand, eight hundred forty-eight".