18414643 has 4 divisors (see below), whose sum is σ = 19831168. Its totient is φ = 16998120.

The previous prime is 18414611. The next prime is 18414653. The reversal of 18414643 is 34641481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18414643 - 2⁵ = 18414611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18414653) 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, 708243 + ... + 708268.

It is an arithmetic number, because the mean of its divisors is an integer number (4957792).

Almost surely, 2^18414643 is an apocalyptic number.

18414643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18414643 is a deficient number, since it is larger than the sum of its proper divisors (1416525).

18414643 is a wasteful number, since it uses less digits than its factorization.

18414643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416524.

The product of its digits is 9216, while the sum is 31.

The square root of 18414643 is about 4291.2286119479. The cubic root of 18414643 is about 264.0712378538.

The spelling of 18414643 in words is "eighteen million, four hundred fourteen thousand, six hundred forty-three".