20105252 has 24 divisors (see below), whose sum is σ = 36893472. Its totient is φ = 9576000.

The previous prime is 20105251. The next prime is 20105257. The reversal of 20105252 is 25250102.

It is a self number, because there is not a number n which added to its sum of digits gives 20105252.

It is not an unprimeable number, because it can be changed into a prime (20105251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5627 + ... + 8477.

It is an arithmetic number, because the mean of its divisors is an integer number (1537228).

Almost surely, 2^20105252 is an apocalyptic number.

It is an amenable number.

20105252 is a deficient number, since it is larger than the sum of its proper divisors (16788220).

20105252 is a wasteful number, since it uses less digits than its factorization.

20105252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939 (or 2937 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20105252 is about 4483.8880449895. Note that the first 3 decimals coincide. The cubic root of 20105252 is about 271.9170919460.

Adding to 20105252 its reverse (25250102), we get a palindrome (45355354).

The spelling of 20105252 in words is "twenty million, one hundred five thousand, two hundred fifty-two".