18030949 has 4 divisors (see below), whose sum is σ = 18053280. Its totient is φ = 18008620.

The previous prime is 18030923. The next prime is 18030959. The reversal of 18030949 is 94903081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18030949 - 2⁷ = 18030821 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 (18030959) 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, 9907 + ... + 11584.

It is an arithmetic number, because the mean of its divisors is an integer number (4513320).

Almost surely, 2^18030949 is an apocalyptic number.

It is an amenable number.

18030949 is a deficient number, since it is larger than the sum of its proper divisors (22331).

18030949 is an equidigital number, since it uses as much as digits as its factorization.

18030949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22330.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18030949 is about 4246.2864952803. The cubic root of 18030949 is about 262.2242558720.

The spelling of 18030949 in words is "eighteen million, thirty thousand, nine hundred forty-nine".