20928008 has 32 divisors (see below), whose sum is σ = 40392000. Its totient is φ = 10161600.

The previous prime is 20927993. The next prime is 20928013. The reversal of 20928008 is 80082902.

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, 47453 + ... + 47891.

It is an arithmetic number, because the mean of its divisors is an integer number (1262250).

Almost surely, 2^20928008 is an apocalyptic number.

It is an amenable number.

20928008 is a deficient number, since it is larger than the sum of its proper divisors (19463992).

20928008 is a wasteful number, since it uses less digits than its factorization.

20928008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 20928008 is about 4574.7139801303. The cubic root of 20928008 is about 275.5767860950.

The spelling of 20928008 in words is "twenty million, nine hundred twenty-eight thousand, eight".