18494038 has 4 divisors (see below), whose sum is σ = 27741060. Its totient is φ = 9247018.

The previous prime is 18494033. The next prime is 18494051. The reversal of 18494038 is 83049481.

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

It is a junction number, because it is equal to n+sod(n) for n = 18493988 and 18494006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18494033) 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, 4623508 + ... + 4623511.

It is an arithmetic number, because the mean of its divisors is an integer number (6935265).

Almost surely, 2^18494038 is an apocalyptic number.

18494038 is a deficient number, since it is larger than the sum of its proper divisors (9247022).

18494038 is an equidigital number, since it uses as much as digits as its factorization.

18494038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9247021.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18494038 is about 4300.4695092513. The cubic root of 18494038 is about 264.4502093830.

The spelling of 18494038 in words is "eighteen million, four hundred ninety-four thousand, thirty-eight".