18338434 has 4 divisors (see below), whose sum is σ = 27507654. Its totient is φ = 9169216.

The previous prime is 18338417. The next prime is 18338459. The reversal of 18338434 is 43483381.

It is a happy number.

18338434 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 6744409 = 3405^2 + 2597^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18338434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4584607 + ... + 4584610.

Almost surely, 2^18338434 is an apocalyptic number.

18338434 is a deficient number, since it is larger than the sum of its proper divisors (9169220).

18338434 is an equidigital number, since it uses as much as digits as its factorization.

18338434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9169219.

The product of its digits is 27648, while the sum is 34.

The square root of 18338434 is about 4282.3397810076. The cubic root of 18338434 is about 263.7064478899.

The spelling of 18338434 in words is "eighteen million, three hundred thirty-eight thousand, four hundred thirty-four".