20816104 has 16 divisors (see below), whose sum is σ = 40727520. Its totient is φ = 9955440.

The previous prime is 20816099. The next prime is 20816111. The reversal of 20816104 is 40161802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56382 + ... + 56749.

It is an arithmetic number, because the mean of its divisors is an integer number (2545470).

Almost surely, 2^20816104 is an apocalyptic number.

It is an amenable number.

20816104 is a deficient number, since it is larger than the sum of its proper divisors (19911416).

20816104 is a wasteful number, since it uses less digits than its factorization.

20816104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113160 (or 113156 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20816104 is about 4562.4668765921. The cubic root of 20816104 is about 275.0847298142.

Adding to 20816104 its reverse (40161802), we get a palindrome (60977906).

The spelling of 20816104 in words is "twenty million, eight hundred sixteen thousand, one hundred four".