18343506 has 16 divisors (see below), whose sum is σ = 37870848. Its totient is φ = 5917200.

The previous prime is 18343483. The next prime is 18343517. The reversal of 18343506 is 60534381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49125 + ... + 49496.

It is an arithmetic number, because the mean of its divisors is an integer number (2366928).

Almost surely, 2^18343506 is an apocalyptic number.

18343506 is an abundant number, since it is smaller than the sum of its proper divisors (19527342).

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

18343506 is a wasteful number, since it uses less digits than its factorization.

18343506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98657.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 18343506 is about 4282.9319396880. The cubic root of 18343506 is about 263.7307574141.

Adding to 18343506 its reverse (60534381), we get a palindrome (78877887).

The spelling of 18343506 in words is "eighteen million, three hundred forty-three thousand, five hundred six".