20000816 has 30 divisors (see below), whose sum is σ = 42598836. Its totient is φ = 9090400.

The previous prime is 20000801. The next prime is 20000821. The reversal of 20000816 is 61800002.

It is a junction number, because it is equal to n+sod(n) for n = 20000794 and 20000803.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3230 + ... + 7101.

Almost surely, 2^20000816 is an apocalyptic number.

It is an amenable number.

20000816 is an abundant number, since it is smaller than the sum of its proper divisors (22598020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20000816 is a wasteful number, since it uses less digits than its factorization.

20000816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10361 (or 10344 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 20000816 is about 4472.2271856425. The cubic root of 20000816 is about 271.4454532172.

Adding to 20000816 its reverse (61800002), we get a palindrome (81800818).

The spelling of 20000816 in words is "twenty million, eight hundred sixteen", and thus it is an aban number.