18387379 has 4 divisors (see below), whose sum is σ = 18483840. Its totient is φ = 18290920.

The previous prime is 18387377. The next prime is 18387403. The reversal of 18387379 is 97378381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18387379 - 2¹ = 18387377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18387377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47944 + ... + 48325.

It is an arithmetic number, because the mean of its divisors is an integer number (4620960).

Almost surely, 2^18387379 is an apocalyptic number.

18387379 is a deficient number, since it is larger than the sum of its proper divisors (96461).

18387379 is an equidigital number, since it uses as much as digits as its factorization.

18387379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96460.

The product of its digits is 254016, while the sum is 46.

The square root of 18387379 is about 4288.0507226478. The cubic root of 18387379 is about 263.9408489685.

The spelling of 18387379 in words is "eighteen million, three hundred eighty-seven thousand, three hundred seventy-nine".