20808448 has 18 divisors (see below), whose sum is σ = 41536124. Its totient is φ = 10404096.

The previous prime is 20808421. The next prime is 20808449. The reversal of 20808448 is 84480802.

It is not an unprimeable number, because it can be changed into a prime (20808449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40386 + ... + 40897.

Almost surely, 2^20808448 is an apocalyptic number.

It is an amenable number.

20808448 is a deficient number, since it is larger than the sum of its proper divisors (20727676).

20808448 is an frugal number, since it uses more digits than its factorization.

20808448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81299 (or 81285 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 20808448 is about 4561.6277796418. The cubic root of 20808448 is about 275.0510010092.

The spelling of 20808448 in words is "twenty million, eight hundred eight thousand, four hundred forty-eight".