18463849 has 4 divisors (see below), whose sum is σ = 18474064. Its totient is φ = 18453636.

The previous prime is 18463847. The next prime is 18463867. The reversal of 18463849 is 94836481.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94836481 = 1699 ⋅55819.

It is a cyclic number.

It is not a de Polignac number, because 18463849 - 2¹ = 18463847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18463843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587 + ... + 6280.

It is an arithmetic number, because the mean of its divisors is an integer number (4618516).

Almost surely, 2^18463849 is an apocalyptic number.

It is an amenable number.

18463849 is a deficient number, since it is larger than the sum of its proper divisors (10215).

18463849 is an equidigital number, since it uses as much as digits as its factorization.

18463849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10214.

The product of its digits is 165888, while the sum is 43.

The square root of 18463849 is about 4296.9581101053. The cubic root of 18463849 is about 264.3062380249.

The spelling of 18463849 in words is "eighteen million, four hundred sixty-three thousand, eight hundred forty-nine".