18343356 has 12 divisors (see below), whose sum is σ = 42801192. Its totient is φ = 6114448.

The previous prime is 18343349. The next prime is 18343361. The reversal of 18343356 is 65334381.

18343356 is nontrivially palindromic in base 7.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764295 + ... + 764318.

It is an arithmetic number, because the mean of its divisors is an integer number (3566766).

Almost surely, 2^18343356 is an apocalyptic number.

It is an amenable number.

18343356 is an abundant number, since it is smaller than the sum of its proper divisors (24457836).

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

18343356 is a wasteful number, since it uses less digits than its factorization.

18343356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528620 (or 1528618 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 18343356 is about 4282.9144282836. The cubic root of 18343356 is about 263.7300385453.

Subtracting 18343356 from its reverse (65334381), we obtain a square (46991025 = 6855²).

The spelling of 18343356 in words is "eighteen million, three hundred forty-three thousand, three hundred fifty-six".