18049193 has 4 divisors (see below), whose sum is σ = 18157440. Its totient is φ = 17940948.

The previous prime is 18049169. The next prime is 18049231. The reversal of 18049193 is 39194081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39194081 = 1601 ⋅24481.

It is a cyclic number.

It is not a de Polignac number, because 18049193 - 2⁸ = 18048937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18049793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53873 + ... + 54206.

It is an arithmetic number, because the mean of its divisors is an integer number (4539360).

Almost surely, 2^18049193 is an apocalyptic number.

It is an amenable number.

18049193 is a deficient number, since it is larger than the sum of its proper divisors (108247).

18049193 is a wasteful number, since it uses less digits than its factorization.

18049193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108246.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 18049193 is about 4248.4341821429. The cubic root of 18049193 is about 262.3126669463.

The spelling of 18049193 in words is "eighteen million, forty-nine thousand, one hundred ninety-three".