18394379 has 2 divisors, whose sum is σ = 18394380. Its totient is φ = 18394378.

The previous prime is 18394373. The next prime is 18394403. The reversal of 18394379 is 97349381.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97349381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18394379 is a prime.

It is not a weakly prime, because it can be changed into another prime (18394373) 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 as a sum of consecutive naturals, namely, 9197189 + 9197190.

It is an arithmetic number, because the mean of its divisors is an integer number (9197190).

Almost surely, 2^18394379 is an apocalyptic number.

18394379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18394379 is an equidigital number, since it uses as much as digits as its factorization.

18394379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 18394379 is about 4288.8668666677. The cubic root of 18394379 is about 263.9743384531.

The spelling of 18394379 in words is "eighteen million, three hundred ninety-four thousand, three hundred seventy-nine".