16520218 has 32 divisors (see below), whose sum is σ = 29756160. Its totient is φ = 6778560.

The previous prime is 16520201. The next prime is 16520239. The reversal of 16520218 is 81202561.

It is a junction number, because it is equal to n+sod(n) for n = 16520192 and 16520201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12828 + ... + 14056.

It is an arithmetic number, because the mean of its divisors is an integer number (929880).

Almost surely, 2^16520218 is an apocalyptic number.

16520218 is a deficient number, since it is larger than the sum of its proper divisors (13235942).

16520218 is a wasteful number, since it uses less digits than its factorization.

16520218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 16520218 is about 4064.5071041886. The cubic root of 16520218 is about 254.6861087131.

Adding to 16520218 its reverse (81202561), we get a palindrome (97722779).

The spelling of 16520218 in words is "sixteen million, five hundred twenty thousand, two hundred eighteen".