20105606 has 8 divisors (see below), whose sum is σ = 30207384. Its totient is φ = 10036480.

The previous prime is 20105599. The next prime is 20105627. The reversal of 20105606 is 60650102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 6560 + ... + 9123.

It is an arithmetic number, because the mean of its divisors is an integer number (3775923).

Almost surely, 2^20105606 is an apocalyptic number.

20105606 is a deficient number, since it is larger than the sum of its proper divisors (10101778).

20105606 is a wasteful number, since it uses less digits than its factorization.

20105606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16326.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20105606 is about 4483.9275194856. The cubic root of 20105606 is about 271.9186878488.

Adding to 20105606 its reverse (60650102), we get a palindrome (80755708).

The spelling of 20105606 in words is "twenty million, one hundred five thousand, six hundred six".