20660105 has 16 divisors (see below), whose sum is σ = 26224128. Its totient is φ = 15600000.

The previous prime is 20660099. The next prime is 20660137. The reversal of 20660105 is 50106602.

It is not a de Polignac number, because 20660105 - 2¹⁸ = 20397961 is a prime.

It is a super-2 number, since 2×20660105² = 853679877222050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4730 + ... + 7980.

It is an arithmetic number, because the mean of its divisors is an integer number (1639008).

Almost surely, 2^20660105 is an apocalyptic number.

It is an amenable number.

20660105 is a deficient number, since it is larger than the sum of its proper divisors (5564023).

20660105 is a wasteful number, since it uses less digits than its factorization.

20660105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328.

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

The square root of 20660105 is about 4545.3388212541. The cubic root of 20660105 is about 274.3958306492.

Adding to 20660105 its reverse (50106602), we get a palindrome (70766707).

The spelling of 20660105 in words is "twenty million, six hundred sixty thousand, one hundred five".