21180848 has 40 divisors (see below), whose sum is σ = 44788800. Its totient is φ = 9644544.

The previous prime is 21180799. The next prime is 21180857. The reversal of 21180848 is 84808112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15788 + ... + 17076.

It is an arithmetic number, because the mean of its divisors is an integer number (1119720).

Almost surely, 2^21180848 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 21180848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22394400).

21180848 is an abundant number, since it is smaller than the sum of its proper divisors (23607952).

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

21180848 is a wasteful number, since it uses less digits than its factorization.

21180848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 21180848 is about 4602.2655290628. The cubic root of 21180848 is about 276.6821326494.

The spelling of 21180848 in words is "twenty-one million, one hundred eighty thousand, eight hundred forty-eight".