21245848 has 32 divisors (see below), whose sum is σ = 43112160. Its totient is φ = 9757440.

The previous prime is 21245843. The next prime is 21245849. The reversal of 21245848 is 84854212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21245843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28861 + ... + 29587.

It is an arithmetic number, because the mean of its divisors is an integer number (1347255).

Almost surely, 2^21245848 is an apocalyptic number.

It is an amenable number.

21245848 is an abundant number, since it is smaller than the sum of its proper divisors (21866312).

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

21245848 is a wasteful number, since it uses less digits than its factorization.

21245848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1023 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 21245848 is about 4609.3218590157. The cubic root of 21245848 is about 276.9648719285.

The spelling of 21245848 in words is "twenty-one million, two hundred forty-five thousand, eight hundred forty-eight".