20818106 has 16 divisors (see below), whose sum is σ = 32439264. Its totient is φ = 10012464.

The previous prime is 20818099. The next prime is 20818121. The reversal of 20818106 is 60181802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3956 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (2027454).

Almost surely, 2^20818106 is an apocalyptic number.

20818106 is a deficient number, since it is larger than the sum of its proper divisors (11621158).

20818106 is a wasteful number, since it uses less digits than its factorization.

20818106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 20818106 is about 4562.6862701702. The cubic root of 20818106 is about 275.0935483388.

Adding to 20818106 its reverse (60181802), we get a palindrome (80999908).

The spelling of 20818106 in words is "twenty million, eight hundred eighteen thousand, one hundred six".