16800820 has 24 divisors (see below), whose sum is σ = 35449344. Its totient is φ = 6688416.

The previous prime is 16800799. The next prime is 16800821. The reversal of 16800820 is 2800861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16800821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2577 + ... + 6343.

It is an arithmetic number, because the mean of its divisors is an integer number (1477056).

Almost surely, 2^16800820 is an apocalyptic number.

16800820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16800820 is an abundant number, since it is smaller than the sum of its proper divisors (18648524).

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

16800820 is a wasteful number, since it uses less digits than its factorization.

16800820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999 (or 3997 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 16800820 is about 4098.8803349207. The cubic root of 16800820 is about 256.1199998937.

The spelling of 16800820 in words is "sixteen million, eight hundred thousand, eight hundred twenty".