20202856 has 16 divisors (see below), whose sum is σ = 38687040. Its totient is φ = 9886320.

The previous prime is 20202841. The next prime is 20202863. The reversal of 20202856 is 65820202.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20202856.

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, 26490 + ... + 27241.

It is an arithmetic number, because the mean of its divisors is an integer number (2417940).

Almost surely, 2^20202856 is an apocalyptic number.

It is an amenable number.

20202856 is a deficient number, since it is larger than the sum of its proper divisors (18484184).

20202856 is a wasteful number, since it uses less digits than its factorization.

20202856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53784 (or 53780 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20202856 is about 4494.7587254490. The cubic root of 20202856 is about 272.3564027539.

The spelling of 20202856 in words is "twenty million, two hundred two thousand, eight hundred fifty-six".