20105050 has 96 divisors (see below), whose sum is σ = 47139840. Its totient is φ = 6220800.

The previous prime is 20105039. The next prime is 20105053. The reversal of 20105050 is 5050102.

It is a self number, because there is not a number n which added to its sum of digits gives 20105050.

It is not an unprimeable number, because it can be changed into a prime (20105053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184396 + ... + 184504.

It is an arithmetic number, because the mean of its divisors is an integer number (491040).

Almost surely, 2^20105050 is an apocalyptic number.

20105050 is an abundant number, since it is smaller than the sum of its proper divisors (27034790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20105050 is a wasteful number, since it uses less digits than its factorization.

20105050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 20105050 is about 4483.8655198389. The cubic root of 20105050 is about 271.9161812812.

Adding to 20105050 its reverse (5050102), we get a palindrome (25155152).

The spelling of 20105050 in words is "twenty million, one hundred five thousand, fifty".