18754943 has 4 divisors (see below), whose sum is σ = 18870168. Its totient is φ = 18639720.

The previous prime is 18754903. The next prime is 18754973. The reversal of 18754943 is 34945781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34945781 = 13 ⋅2688137.

It is a cyclic number.

It is not a de Polignac number, because 18754943 - 2²⁴ = 1977727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18754943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18754903) 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, 57368 + ... + 57693.

It is an arithmetic number, because the mean of its divisors is an integer number (4717542).

Almost surely, 2^18754943 is an apocalyptic number.

18754943 is a deficient number, since it is larger than the sum of its proper divisors (115225).

18754943 is a wasteful number, since it uses less digits than its factorization.

18754943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115224.

The product of its digits is 120960, while the sum is 41.

The square root of 18754943 is about 4330.6977497858. The cubic root of 18754943 is about 265.6879856725.

The spelling of 18754943 in words is "eighteen million, seven hundred fifty-four thousand, nine hundred forty-three".