20105732 has 12 divisors (see below), whose sum is σ = 36320256. Its totient is φ = 9728520.

The previous prime is 20105731. The next prime is 20105741. The reversal of 20105732 is 23750102.

It is not an unprimeable number, because it can be changed into a prime (20105731) 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, 80948 + ... + 81195.

It is an arithmetic number, because the mean of its divisors is an integer number (3026688).

Almost surely, 2^20105732 is an apocalyptic number.

It is an amenable number.

20105732 is a deficient number, since it is larger than the sum of its proper divisors (16214524).

20105732 is a wasteful number, since it uses less digits than its factorization.

20105732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162178 (or 162176 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20105732 is about 4483.9415696461. The cubic root of 20105732 is about 271.9192558775.

Adding to 20105732 its reverse (23750102), we get a palindrome (43855834).

The spelling of 20105732 in words is "twenty million, one hundred five thousand, seven hundred thirty-two".