18365434 has 4 divisors (see below), whose sum is σ = 27548154. Its totient is φ = 9182716.

The previous prime is 18365411. The next prime is 18365441. The reversal of 18365434 is 43456381.

It is a happy number.

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., 14175225 + 4190209 = 3765^2 + 2047^2 .

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18365434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4591357 + ... + 4591360.

Almost surely, 2^18365434 is an apocalyptic number.

18365434 is a deficient number, since it is larger than the sum of its proper divisors (9182720).

18365434 is an equidigital number, since it uses as much as digits as its factorization.

18365434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182719.

The product of its digits is 34560, while the sum is 34.

The square root of 18365434 is about 4285.4911037126. The cubic root of 18365434 is about 263.8358043117.

The spelling of 18365434 in words is "eighteen million, three hundred sixty-five thousand, four hundred thirty-four".