18076378 has 4 divisors (see below), whose sum is σ = 27114570. Its totient is φ = 9038188.

The previous prime is 18076351. The next prime is 18076381. The reversal of 18076378 is 87367081.

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., 17867529 + 208849 = 4227^2 + 457^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18076378.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4519093 + ... + 4519096.

Almost surely, 2^18076378 is an apocalyptic number.

18076378 is a deficient number, since it is larger than the sum of its proper divisors (9038192).

18076378 is an equidigital number, since it uses as much as digits as its factorization.

18076378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9038191.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 18076378 is about 4251.6323923877. The cubic root of 18076378 is about 262.4442959655. Note that the first 3 decimals are identical.

The spelling of 18076378 in words is "eighteen million, seventy-six thousand, three hundred seventy-eight".