16806418 has 12 divisors (see below), whose sum is σ = 25458462. Its totient is φ = 8321040.

The previous prime is 16806403. The next prime is 16806443. The reversal of 16806418 is 81460861.

It can be written as a sum of positive squares in only one way, i.e., 15499969 + 1306449 = 3937^2 + 1143^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31998 + ... + 32518.

Almost surely, 2^16806418 is an apocalyptic number.

16806418 is a deficient number, since it is larger than the sum of its proper divisors (8652044).

16806418 is an equidigital number, since it uses as much as digits as its factorization.

16806418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 16806418 is about 4099.5631474585. The cubic root of 16806418 is about 256.1484429607.

The spelling of 16806418 in words is "sixteen million, eight hundred six thousand, four hundred eighteen".