18348194 has 4 divisors (see below), whose sum is σ = 27522294. Its totient is φ = 9174096.

The previous prime is 18348193. The next prime is 18348199. The reversal of 18348194 is 49184381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49184381 = 5623 ⋅8747.

It can be written as a sum of positive squares in only one way, i.e., 10857025 + 7491169 = 3295^2 + 2737^2 .

It is not an unprimeable number, because it can be changed into a prime (18348193) by changing a digit.

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, 4587047 + ... + 4587050.

Almost surely, 2^18348194 is an apocalyptic number.

18348194 is a deficient number, since it is larger than the sum of its proper divisors (9174100).

18348194 is an equidigital number, since it uses as much as digits as its factorization.

18348194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174099.

The product of its digits is 27648, while the sum is 38.

The square root of 18348194 is about 4283.4791933661. The cubic root of 18348194 is about 263.7532224848.

The spelling of 18348194 in words is "eighteen million, three hundred forty-eight thousand, one hundred ninety-four".