20806118 has 8 divisors (see below), whose sum is σ = 31228848. Its totient is φ = 10396504.

The previous prime is 20806117. The next prime is 20806127. The reversal of 20806118 is 81160802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20806117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3455 + ... + 7317.

It is an arithmetic number, because the mean of its divisors is an integer number (3903606).

Almost surely, 2^20806118 is an apocalyptic number.

20806118 is a deficient number, since it is larger than the sum of its proper divisors (10422730).

20806118 is a wasteful number, since it uses less digits than its factorization.

20806118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558.

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

The square root of 20806118 is about 4561.3723812028. The cubic root of 20806118 is about 275.0407344618.

The spelling of 20806118 in words is "twenty million, eight hundred six thousand, one hundred eighteen".