18422743 has 4 divisors (see below), whose sum is σ = 19058040. Its totient is φ = 17787448.

The previous prime is 18422737. The next prime is 18422753. The reversal of 18422743 is 34722481.

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 18422743 - 2⁹ = 18422231 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 (18422753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317605 + ... + 317662.

It is an arithmetic number, because the mean of its divisors is an integer number (4764510).

Almost surely, 2^18422743 is an apocalyptic number.

18422743 is a deficient number, since it is larger than the sum of its proper divisors (635297).

18422743 is an equidigital number, since it uses as much as digits as its factorization.

18422743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635296.

The product of its digits is 10752, while the sum is 31.

The square root of 18422743 is about 4292.1722938391. The cubic root of 18422743 is about 264.1099509490.

The spelling of 18422743 in words is "eighteen million, four hundred twenty-two thousand, seven hundred forty-three".