18743113 has 4 divisors (see below), whose sum is σ = 18813060. Its totient is φ = 18673168.

The previous prime is 18743099. The next prime is 18743117. The reversal of 18743113 is 31134781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31134781 = 89 ⋅349829.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 18207289 = 732^2 + 4267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18743113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18743117) 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, 34570 + ... + 35107.

It is an arithmetic number, because the mean of its divisors is an integer number (4703265).

Almost surely, 2^18743113 is an apocalyptic number.

It is an amenable number.

18743113 is a deficient number, since it is larger than the sum of its proper divisors (69947).

18743113 is an equidigital number, since it uses as much as digits as its factorization.

18743113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69946.

The product of its digits is 2016, while the sum is 28.

The square root of 18743113 is about 4329.3317036236. The cubic root of 18743113 is about 265.6321115143.

Adding to 18743113 its reverse (31134781), we get a palindrome (49877894).

The spelling of 18743113 in words is "eighteen million, seven hundred forty-three thousand, one hundred thirteen".