18713303 has 4 divisors (see below), whose sum is σ = 21386640. Its totient is φ = 16039968.

The previous prime is 18713297. The next prime is 18713327. The reversal of 18713303 is 30331781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30331781 = 149 ⋅203569.

It is not a de Polignac number, because 18713303 - 2⁴ = 18713287 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 (18713333) 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, 1336658 + ... + 1336671.

It is an arithmetic number, because the mean of its divisors is an integer number (5346660).

Almost surely, 2^18713303 is an apocalyptic number.

18713303 is a deficient number, since it is larger than the sum of its proper divisors (2673337).

18713303 is an equidigital number, since it uses as much as digits as its factorization.

18713303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673336.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 18713303 is about 4325.8875389913. The cubic root of 18713303 is about 265.4912118507.

The spelling of 18713303 in words is "eighteen million, seven hundred thirteen thousand, three hundred three".