18379513 has 4 divisors (see below), whose sum is σ = 18388368. Its totient is φ = 18370660.

The previous prime is 18379469. The next prime is 18379523. The reversal of 18379513 is 31597381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18379513 - 2¹⁷ = 18248441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18379523) 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, 558 + ... + 6088.

It is an arithmetic number, because the mean of its divisors is an integer number (4597092).

Almost surely, 2^18379513 is an apocalyptic number.

It is an amenable number.

18379513 is a deficient number, since it is larger than the sum of its proper divisors (8855).

18379513 is an equidigital number, since it uses as much as digits as its factorization.

18379513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8854.

The product of its digits is 22680, while the sum is 37.

The square root of 18379513 is about 4287.1334245624. The cubic root of 18379513 is about 263.9032062128.

The spelling of 18379513 in words is "eighteen million, three hundred seventy-nine thousand, five hundred thirteen".