16816885 has 8 divisors (see below), whose sum is σ = 20316600. Its totient is φ = 13362624.

The previous prime is 16816883. The next prime is 16816889. The reversal of 16816885 is 58861861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 487204 + 16329681 = 698^2 + 4041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16816885 - 2¹ = 16816883 is a prime.

It is a super-2 number, since 2×16816885² = 565615242206450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16816883) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10542 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (2539575).

Almost surely, 2^16816885 is an apocalyptic number.

It is an amenable number.

16816885 is a deficient number, since it is larger than the sum of its proper divisors (3499715).

16816885 is a wasteful number, since it uses less digits than its factorization.

16816885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22727.

The product of its digits is 92160, while the sum is 43.

The square root of 16816885 is about 4100.8395481901. The cubic root of 16816885 is about 256.2016081533.

The spelling of 16816885 in words is "sixteen million, eight hundred sixteen thousand, eight hundred eighty-five".