18495049 has 4 divisors (see below), whose sum is σ = 18658836. Its totient is φ = 18331264.

The previous prime is 18495041. The next prime is 18495067. The reversal of 18495049 is 94059481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94059481 = 19 ⋅4950499.

It can be written as a sum of positive squares in 2 ways, for example, as 1742400 + 16752649 = 1320^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 18495049 - 2³ = 18495041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18495041) 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, 81724 + ... + 81949.

It is an arithmetic number, because the mean of its divisors is an integer number (4664709).

Almost surely, 2^18495049 is an apocalyptic number.

It is an amenable number.

18495049 is a deficient number, since it is larger than the sum of its proper divisors (163787).

18495049 is a wasteful number, since it uses less digits than its factorization.

18495049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163786.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18495049 is about 4300.5870529499. The cubic root of 18495049 is about 264.4550281303.

The spelling of 18495049 in words is "eighteen million, four hundred ninety-five thousand, forty-nine".