18379378 has 4 divisors (see below), whose sum is σ = 27569070. Its totient is φ = 9189688.

The previous prime is 18379351. The next prime is 18379379. The reversal of 18379378 is 87397381.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 14311089 + 4068289 = 3783^2 + 2017^2 .

It is not an unprimeable number, because it can be changed into a prime (18379379) 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, 4594843 + ... + 4594846.

Almost surely, 2^18379378 is an apocalyptic number.

18379378 is a deficient number, since it is larger than the sum of its proper divisors (9189692).

18379378 is an equidigital number, since it uses as much as digits as its factorization.

18379378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9189691.

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

The square root of 18379378 is about 4287.1176797471. The cubic root of 18379378 is about 263.9025600764.

The spelling of 18379378 in words is "eighteen million, three hundred seventy-nine thousand, three hundred seventy-eight".