20606105 has 16 divisors (see below), whose sum is σ = 27071184. Its totient is φ = 14964480.

The previous prime is 20606099. The next prime is 20606119. The reversal of 20606105 is 50160602.

It can be written as a sum of positive squares in 8 ways, for example, as 6370576 + 14235529 = 2524^2 + 3773^2 .

It is not a de Polignac number, because 20606105 - 2¹² = 20602009 is a prime.

It is a super-2 number, since 2×20606105² = 849223126542050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 1367 + ... + 6563.

It is an arithmetic number, because the mean of its divisors is an integer number (1691949).

Almost surely, 2^20606105 is an apocalyptic number.

It is an amenable number.

20606105 is a deficient number, since it is larger than the sum of its proper divisors (6465079).

20606105 is a wasteful number, since it uses less digits than its factorization.

20606105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276.

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

The square root of 20606105 is about 4539.3947834486. The cubic root of 20606105 is about 274.1565562411.

Adding to 20606105 its reverse (50160602), we get a palindrome (70766707).

The spelling of 20606105 in words is "twenty million, six hundred six thousand, one hundred five".