18336434 has 4 divisors (see below), whose sum is σ = 27504654. Its totient is φ = 9168216.

The previous prime is 18336391. The next prime is 18336467. The reversal of 18336434 is 43463381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43463381 = 13 ⋅3343337.

It can be written as a sum of positive squares in only one way, i.e., 17850625 + 485809 = 4225^2 + 697^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18336434.

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 as a sum of consecutive naturals, namely, 4584107 + ... + 4584110.

Almost surely, 2^18336434 is an apocalyptic number.

18336434 is a deficient number, since it is larger than the sum of its proper divisors (9168220).

18336434 is an equidigital number, since it uses as much as digits as its factorization.

18336434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9168219.

The product of its digits is 20736, while the sum is 32.

The square root of 18336434 is about 4282.1062574392. The cubic root of 18336434 is about 263.6968608832.

The spelling of 18336434 in words is "eighteen million, three hundred thirty-six thousand, four hundred thirty-four".