20828008 has 16 divisors (see below), whose sum is σ = 39226500. Its totient is φ = 10367616.

The previous prime is 20827999. The next prime is 20828029. The reversal of 20828008 is 80082802.

It can be written as a sum of positive squares in 2 ways, for example, as 19027044 + 1800964 = 4362^2 + 1342^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3853 + ... + 7516.

Almost surely, 2^20828008 is an apocalyptic number.

It is an amenable number.

20828008 is a deficient number, since it is larger than the sum of its proper divisors (18398492).

20828008 is a wasteful number, since it uses less digits than its factorization.

20828008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11604 (or 11600 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 20828008 is about 4563.7712475539. The cubic root of 20828008 is about 275.1371569256.

The spelling of 20828008 in words is "twenty million, eight hundred twenty-eight thousand, eight".