16818738 has 8 divisors (see below), whose sum is σ = 33637488. Its totient is φ = 5606244.

The previous prime is 16818731. The next prime is 16818749. The reversal of 16818738 is 83781861.

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

16818738 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 16818738.

It is not an unprimeable number, because it can be changed into a prime (16818731) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1401556 + ... + 1401567.

It is an arithmetic number, because the mean of its divisors is an integer number (4204686).

Almost surely, 2^16818738 is an apocalyptic number.

16818738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16818738 is a wasteful number, since it uses less digits than its factorization.

16818738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803128.

The product of its digits is 64512, while the sum is 42.

The square root of 16818738 is about 4101.0654713135. The cubic root of 16818738 is about 256.2110178258.

The spelling of 16818738 in words is "sixteen million, eight hundred eighteen thousand, seven hundred thirty-eight".