18853749 has 8 divisors (see below), whose sum is σ = 27931520. Its totient is φ = 12569148.

The previous prime is 18853729. The next prime is 18853759. The reversal of 18853749 is 94735881.

It is not a de Polignac number, because 18853749 - 2¹⁷ = 18722677 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 (18853729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349117 + ... + 349170.

It is an arithmetic number, because the mean of its divisors is an integer number (3491440).

Almost surely, 2^18853749 is an apocalyptic number.

It is an amenable number.

18853749 is a deficient number, since it is larger than the sum of its proper divisors (9077771).

18853749 is an equidigital number, since it uses as much as digits as its factorization.

18853749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698296 (or 698290 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 18853749 is about 4342.0903951899. The cubic root of 18853749 is about 266.1537402472.

The spelling of 18853749 in words is "eighteen million, eight hundred fifty-three thousand, seven hundred forty-nine".