20168806 has 16 divisors (see below), whose sum is σ = 35380224. Its totient is φ = 8442504.

The previous prime is 20168803. The next prime is 20168821. The reversal of 20168806 is 60886102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16150 + ... + 17353.

It is an arithmetic number, because the mean of its divisors is an integer number (2211264).

Almost surely, 2^20168806 is an apocalyptic number.

20168806 is a deficient number, since it is larger than the sum of its proper divisors (15211418).

20168806 is a wasteful number, since it uses less digits than its factorization.

20168806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33555.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 20168806 is about 4490.9693831065. The cubic root of 20168806 is about 272.2033064062.

The spelling of 20168806 in words is "twenty million, one hundred sixty-eight thousand, eight hundred six".