16818442 has 8 divisors (see below), whose sum is σ = 25488036. Its totient is φ = 8322432.

The previous prime is 16818427. The next prime is 16818443. The reversal of 16818442 is 24481861.

It can be written as a sum of positive squares in 2 ways, for example, as 16801801 + 16641 = 4099^2 + 129^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 16818398 and 16818407.

It is not an unprimeable number, because it can be changed into a prime (16818443) 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, 43153 + ... + 43540.

Almost surely, 2^16818442 is an apocalyptic number.

16818442 is a deficient number, since it is larger than the sum of its proper divisors (8669594).

16818442 is an equidigital number, since it uses as much as digits as its factorization.

16818442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86792.

The product of its digits is 12288, while the sum is 34.

The square root of 16818442 is about 4101.0293829720. The cubic root of 16818442 is about 256.2095147621.

The spelling of 16818442 in words is "sixteen million, eight hundred eighteen thousand, four hundred forty-two".