18216346 has 8 divisors (see below), whose sum is σ = 27355680. Its totient is φ = 9097788.

The previous prime is 18216343. The next prime is 18216353. The reversal of 18216346 is 64361281.

It is a happy number.

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 (18216343) 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, 2776 + ... + 6643.

It is an arithmetic number, because the mean of its divisors is an integer number (3419460).

Almost surely, 2^18216346 is an apocalyptic number.

18216346 is a deficient number, since it is larger than the sum of its proper divisors (9139334).

18216346 is an equidigital number, since it uses as much as digits as its factorization.

18216346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10388.

The product of its digits is 6912, while the sum is 31.

The square root of 18216346 is about 4268.0611523267. The cubic root of 18216346 is about 263.1199364297.

The spelling of 18216346 in words is "eighteen million, two hundred sixteen thousand, three hundred forty-six".