21130848 has 96 divisors (see below), whose sum is σ = 63393120. Its totient is φ = 6842880.

The previous prime is 21130843. The next prime is 21130853. The reversal of 21130848 is 84803112.

It is an interprime number because it is at equal distance from previous prime (21130843) and next prime (21130853).

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130843) 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, 31638 + ... + 32298.

It is an arithmetic number, because the mean of its divisors is an integer number (660345).

Almost surely, 2^21130848 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 21130848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31696560).

21130848 is an abundant number, since it is smaller than the sum of its proper divisors (42262272).

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

21130848 is a wasteful number, since it uses less digits than its factorization.

21130848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 703 counting only the distinct ones).

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

The square root of 21130848 is about 4596.8302122223. The cubic root of 21130848 is about 276.4642470288.

The spelling of 21130848 in words is "twenty-one million, one hundred thirty thousand, eight hundred forty-eight".