20105582 has 24 divisors (see below), whose sum is σ = 35297136. Its totient is φ = 8563968.

The previous prime is 20105573. The next prime is 20105597. The reversal of 20105582 is 28550102.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 18383 + ... + 19445.

It is an arithmetic number, because the mean of its divisors is an integer number (1470714).

Almost surely, 2^20105582 is an apocalyptic number.

20105582 is a deficient number, since it is larger than the sum of its proper divisors (15191554).

20105582 is a wasteful number, since it uses less digits than its factorization.

20105582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 20105582 is about 4483.9248432595. The cubic root of 20105582 is about 271.9185796526.

Adding to 20105582 its reverse (28550102), we get a palindrome (48655684).

The spelling of 20105582 in words is "twenty million, one hundred five thousand, five hundred eighty-two".