20845108 has 6 divisors (see below), whose sum is σ = 36478946. Its totient is φ = 10422552.

The previous prime is 20845091. The next prime is 20845129. The reversal of 20845108 is 80154802.

It can be written as a sum of positive squares in only one way, i.e., 11035684 + 9809424 = 3322^2 + 3132^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605635 + ... + 2605642.

Almost surely, 2^20845108 is an apocalyptic number.

It is an amenable number.

20845108 is a deficient number, since it is larger than the sum of its proper divisors (15633838).

20845108 is a wasteful number, since it uses less digits than its factorization.

20845108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211281 (or 5211279 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 20845108 is about 4565.6443137853. The cubic root of 20845108 is about 275.2124331018.

The spelling of 20845108 in words is "twenty million, eight hundred forty-five thousand, one hundred eight".