20608928 has 12 divisors (see below), whose sum is σ = 40573890. Its totient is φ = 10304448.

The previous prime is 20608927. The next prime is 20608979. The reversal of 20608928 is 82980602.

It can be written as a sum of positive squares in only one way, i.e., 12475024 + 8133904 = 3532^2 + 2852^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20608927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321983 + ... + 322046.

Almost surely, 2^20608928 is an apocalyptic number.

It is an amenable number.

20608928 is a deficient number, since it is larger than the sum of its proper divisors (19964962).

20608928 is an equidigital number, since it uses as much as digits as its factorization.

20608928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644039 (or 644031 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20608928 is about 4539.7057173345. The cubic root of 20608928 is about 274.1690753241.

The spelling of 20608928 in words is "twenty million, six hundred eight thousand, nine hundred twenty-eight".