20081106 has 24 divisors (see below), whose sum is σ = 44161104. Its totient is φ = 6593400.

The previous prime is 20081077. The next prime is 20081107. The reversal of 20081106 is 60118002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20081107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7120 + ... + 9531.

It is an arithmetic number, because the mean of its divisors is an integer number (1840046).

Almost surely, 2^20081106 is an apocalyptic number.

20081106 is an abundant number, since it is smaller than the sum of its proper divisors (24079998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20081106 is a wasteful number, since it uses less digits than its factorization.

20081106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16726 (or 16723 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 20081106 is about 4481.1947067718. The cubic root of 20081106 is about 271.8081927011.

Adding to 20081106 its reverse (60118002), we get a palindrome (80199108).

The spelling of 20081106 in words is "twenty million, eighty-one thousand, one hundred six".