16327818 has 40 divisors (see below), whose sum is σ = 39405828. Its totient is φ = 5023296.

The previous prime is 16327789. The next prime is 16327877. The reversal of 16327818 is 81872361.

16327818 is a `hidden beast` number, since 1 + 632 + 7 + 8 + 18 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15896169 + 431649 = 3987^2 + 657^2 .

It is a super-2 number, since 2×16327818² = 533195281282248, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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 19 ways as a sum of consecutive naturals, for example, 1771 + ... + 5982.

Almost surely, 2^16327818 is an apocalyptic number.

16327818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16327818 is an abundant number, since it is smaller than the sum of its proper divisors (23078010).

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

16327818 is a wasteful number, since it uses less digits than its factorization.

16327818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780 (or 7771 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 16327818 is about 4040.7694811756. The cubic root of 16327818 is about 253.6935254131.

The spelling of 16327818 in words is "sixteen million, three hundred twenty-seven thousand, eight hundred eighteen".