20115106 has 16 divisors (see below), whose sum is σ = 33475680. Its totient is φ = 8987680.

The previous prime is 20115101. The next prime is 20115113. The reversal of 20115106 is 60151102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20115106.

It is not an unprimeable number, because it can be changed into a prime (20115101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6451 + ... + 9046.

It is an arithmetic number, because the mean of its divisors is an integer number (2092230).

Almost surely, 2^20115106 is an apocalyptic number.

20115106 is a deficient number, since it is larger than the sum of its proper divisors (13360574).

20115106 is a wasteful number, since it uses less digits than its factorization.

20115106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15569.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 20115106 is about 4484.9867335367. The cubic root of 20115106 is about 271.9615087546.

Adding to 20115106 its reverse (60151102), we get a palindrome (80266208).

It can be divided in two parts, 2011 and 5106, that added together give a palindrome (7117).

The spelling of 20115106 in words is "twenty million, one hundred fifteen thousand, one hundred six".