16560220 has 12 divisors (see below), whose sum is σ = 34776504. Its totient is φ = 6624080.

The previous prime is 16560211. The next prime is 16560239. The reversal of 16560220 is 2206561.

It is a junction number, because it is equal to n+sod(n) for n = 16560191 and 16560200.

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 3 ways as a sum of consecutive naturals, for example, 413986 + ... + 414025.

It is an arithmetic number, because the mean of its divisors is an integer number (2898042).

Almost surely, 2^16560220 is an apocalyptic number.

16560220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16560220 is an abundant number, since it is smaller than the sum of its proper divisors (18216284).

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

16560220 is a wasteful number, since it uses less digits than its factorization.

16560220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828020 (or 828018 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16560220 is about 4069.4250208107. The cubic root of 16560220 is about 254.8915083783.

Adding to 16560220 its reverse (2206561), we get a palindrome (18766781).

The spelling of 16560220 in words is "sixteen million, five hundred sixty thousand, two hundred twenty".