18753943 has 4 divisors (see below), whose sum is σ = 20196568. Its totient is φ = 17311320.

The previous prime is 18753929. The next prime is 18753949. The reversal of 18753943 is 34935781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34935781 = 23 ⋅1518947.

It is not a de Polignac number, because 18753943 - 2¹³ = 18745751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18753896 and 18753905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18753949) 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, 721293 + ... + 721318.

It is an arithmetic number, because the mean of its divisors is an integer number (5049142).

Almost surely, 2^18753943 is an apocalyptic number.

18753943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18753943 is a deficient number, since it is larger than the sum of its proper divisors (1442625).

18753943 is a wasteful number, since it uses less digits than its factorization.

18753943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442624.

The product of its digits is 90720, while the sum is 40.

The square root of 18753943 is about 4330.5822934104. The cubic root of 18753943 is about 265.6832634915.

The spelling of 18753943 in words is "eighteen million, seven hundred fifty-three thousand, nine hundred forty-three".