20105332 has 12 divisors (see below), whose sum is σ = 37890916. Its totient is φ = 9279360.

The previous prime is 20105321. The next prime is 20105333. The reversal of 20105332 is 23350102.

It can be written as a sum of positive squares in 2 ways, for example, as 2178576 + 17926756 = 1476^2 + 4234^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193269 + ... + 193372.

Almost surely, 2^20105332 is an apocalyptic number.

It is an amenable number.

20105332 is a deficient number, since it is larger than the sum of its proper divisors (17785584).

20105332 is a wasteful number, since it uses less digits than its factorization.

20105332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386658 (or 386656 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20105332 is about 4483.8969658100. The cubic root of 20105332 is about 271.9174526036.

Adding to 20105332 its reverse (23350102), we get a palindrome (43455434).

The spelling of 20105332 in words is "twenty million, one hundred five thousand, three hundred thirty-two".