20103856 has 20 divisors (see below), whose sum is σ = 39029992. Its totient is φ = 10031616.

The previous prime is 20103821. The next prime is 20103859. The reversal of 20103856 is 65830102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20103856.

It is not an unprimeable number, because it can be changed into a prime (20103859) 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, 9835 + ... + 11701.

Almost surely, 2^20103856 is an apocalyptic number.

It is an amenable number.

20103856 is a deficient number, since it is larger than the sum of its proper divisors (18926136).

20103856 is a wasteful number, since it uses less digits than its factorization.

20103856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20103856 is about 4483.7323738154. The cubic root of 20103856 is about 271.9107983161.

Adding to 20103856 its reverse (65830102), we get a palindrome (85933958).

The spelling of 20103856 in words is "twenty million, one hundred three thousand, eight hundred fifty-six".