16864418 has 8 divisors (see below), whose sum is σ = 25357980. Its totient is φ = 8411760.

The previous prime is 16864411. The next prime is 16864423. The reversal of 16864418 is 81446861.

It can be written as a sum of positive squares in 2 ways, for example, as 13227769 + 3636649 = 3637^2 + 1907^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16864411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9173 + ... + 10856.

Almost surely, 2^16864418 is an apocalyptic number.

16864418 is a deficient number, since it is larger than the sum of its proper divisors (8493562).

16864418 is a wasteful number, since it uses less digits than its factorization.

16864418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20452.

The product of its digits is 36864, while the sum is 38.

The square root of 16864418 is about 4106.6309792822. The cubic root of 16864418 is about 256.4427660782.

The spelling of 16864418 in words is "sixteen million, eight hundred sixty-four thousand, four hundred eighteen".