21608048 has 40 divisors (see below), whose sum is σ = 52199040. Its totient is φ = 8418240.

The previous prime is 21608039. The next prime is 21608077. The reversal of 21608048 is 84080612.

It is a self number, because there is not a number n which added to its sum of digits gives 21608048.

It is a congruent number.

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, 7538 + ... + 10001.

It is an arithmetic number, because the mean of its divisors is an integer number (1304976).

Almost surely, 2^21608048 is an apocalyptic number.

21608048 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21608048 is an abundant number, since it is smaller than the sum of its proper divisors (30590992).

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

21608048 is a wasteful number, since it uses less digits than its factorization.

21608048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17565 (or 17559 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 21608048 is about 4648.4457617574. The cubic root of 21608048 is about 278.5299141542.

The spelling of 21608048 in words is "twenty-one million, six hundred eight thousand, forty-eight".