18030349 has 4 divisors (see below), whose sum is σ = 18100764. Its totient is φ = 17959936.

The previous prime is 18030323. The next prime is 18030361. The reversal of 18030349 is 94303081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94303081 = 193 ⋅488617.

It can be written as a sum of positive squares in 2 ways, for example, as 11492100 + 6538249 = 3390^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 18030349 - 2¹³ = 18022157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18034349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34822 + ... + 35335.

It is an arithmetic number, because the mean of its divisors is an integer number (4525191).

Almost surely, 2^18030349 is an apocalyptic number.

It is an amenable number.

18030349 is a deficient number, since it is larger than the sum of its proper divisors (70415).

18030349 is an equidigital number, since it uses as much as digits as its factorization.

18030349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70414.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18030349 is about 4246.2158447257. The cubic root of 18030349 is about 262.2213472379.

The spelling of 18030349 in words is "eighteen million, thirty thousand, three hundred forty-nine".