20620105 has 16 divisors (see below), whose sum is σ = 27324864. Its totient is φ = 14812480.

The previous prime is 20620097. The next prime is 20620109. The reversal of 20620105 is 50102602.

It is a happy number.

It is not a de Polignac number, because 20620105 - 2³ = 20620097 is a prime.

It is a super-2 number, since 2×20620105² = 850377460422050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20620109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2307 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (1707804).

Almost surely, 2^20620105 is an apocalyptic number.

It is an amenable number.

20620105 is a deficient number, since it is larger than the sum of its proper divisors (6704759).

20620105 is a wasteful number, since it uses less digits than its factorization.

20620105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20620105 is about 4540.9365774034. The cubic root of 20620105 is about 274.2186304480.

Adding to 20620105 its reverse (50102602), we get a palindrome (70722707).

The spelling of 20620105 in words is "twenty million, six hundred twenty thousand, one hundred five".