16550820 has 144 divisors (see below), whose sum is σ = 59072832. Its totient is φ = 3697920.

The previous prime is 16550801. The next prime is 16550873. The reversal of 16550820 is 2805561.

16550820 is a `hidden beast` number, since 1 + 655 + 0 + 8 + 2 + 0 = 666.

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 in 47 ways as a sum of consecutive naturals, for example, 25419 + ... + 26061.

It is an arithmetic number, because the mean of its divisors is an integer number (410228).

Almost surely, 2^16550820 is an apocalyptic number.

16550820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16550820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29536416).

16550820 is an abundant number, since it is smaller than the sum of its proper divisors (42522012).

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

16550820 is a wasteful number, since it uses less digits than its factorization.

16550820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 16550820 is about 4068.2699025507. The cubic root of 16550820 is about 254.8432716266.

The spelling of 16550820 in words is "sixteen million, five hundred fifty thousand, eight hundred twenty".