20875684 has 12 divisors (see below), whose sum is σ = 36564444. Its totient is φ = 10428704.

The previous prime is 20875681. The next prime is 20875703. The reversal of 20875684 is 48657802.

It can be written as a sum of positive squares in 2 ways, for example, as 12054784 + 8820900 = 3472^2 + 2970^2 .

It is not an unprimeable number, because it can be changed into a prime (20875681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7782 + ... + 10114.

It is an arithmetic number, because the mean of its divisors is an integer number (3047037).

Almost surely, 2^20875684 is an apocalyptic number.

It is an amenable number.

20875684 is a deficient number, since it is larger than the sum of its proper divisors (15688760).

20875684 is a wasteful number, since it uses less digits than its factorization.

20875684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574 (or 4572 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 20875684 is about 4568.9915736407. The cubic root of 20875684 is about 275.3469296357.

The spelling of 20875684 in words is "twenty million, eight hundred seventy-five thousand, six hundred eighty-four".