18379393 has 8 divisors (see below), whose sum is σ = 18790056. Its totient is φ = 17971200.

The previous prime is 18379381. The next prime is 18379399. The reversal of 18379393 is 39397381.

It can be written as a sum of positive squares in 4 ways, for example, as 7436529 + 10942864 = 2727^2 + 3308^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18379393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18379399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28353 + ... + 28993.

It is an arithmetic number, because the mean of its divisors is an integer number (2348757).

Almost surely, 2^18379393 is an apocalyptic number.

It is an amenable number.

18379393 is a deficient number, since it is larger than the sum of its proper divisors (410663).

18379393 is an equidigital number, since it uses as much as digits as its factorization.

18379393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its digits is 122472, while the sum is 43.

The square root of 18379393 is about 4287.1194291739. The cubic root of 18379393 is about 263.9026318695.

The spelling of 18379393 in words is "eighteen million, three hundred seventy-nine thousand, three hundred ninety-three".