21845048 has 16 divisors (see below), whose sum is σ = 41040000. Its totient is φ = 10901056.

The previous prime is 21845029. The next prime is 21845069. The reversal of 21845048 is 84054812.

It is a happy number.

It is a super-2 number, since 2×21845048² = 954412244244608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2153 + ... + 6951.

It is an arithmetic number, because the mean of its divisors is an integer number (2565000).

Almost surely, 2^21845048 is an apocalyptic number.

It is an amenable number.

21845048 is a deficient number, since it is larger than the sum of its proper divisors (19194952).

21845048 is a wasteful number, since it uses less digits than its factorization.

21845048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374 (or 5370 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 21845048 is about 4673.8686331560. The cubic root of 21845048 is about 279.5445316125.

The spelling of 21845048 in words is "twenty-one million, eight hundred forty-five thousand, forty-eight".