20016806 has 4 divisors (see below), whose sum is σ = 30025212. Its totient is φ = 10008402.

The previous prime is 20016791. The next prime is 20016827. The reversal of 20016806 is 60861002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5004200 + ... + 5004203.

It is an arithmetic number, because the mean of its divisors is an integer number (7506303).

Almost surely, 2^20016806 is an apocalyptic number.

20016806 is a deficient number, since it is larger than the sum of its proper divisors (10008406).

20016806 is a wasteful number, since it uses less digits than its factorization.

20016806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008405.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20016806 is about 4474.0145283626. The cubic root of 20016806 is about 271.5177712106.

Adding to 20016806 its reverse (60861002), we get a palindrome (80877808).

The spelling of 20016806 in words is "twenty million, sixteen thousand, eight hundred six".