18494305 has 4 divisors (see below), whose sum is σ = 22193172. Its totient is φ = 14795440.

The previous prime is 18494303. The next prime is 18494347. The reversal of 18494305 is 50349481.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2140369 + 16353936 = 1463^2 + 4044^2 .

It is not a de Polignac number, because 18494305 - 2¹ = 18494303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18494303) 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, 1849426 + ... + 1849435.

It is an arithmetic number, because the mean of its divisors is an integer number (5548293).

Almost surely, 2^18494305 is an apocalyptic number.

It is an amenable number.

18494305 is a deficient number, since it is larger than the sum of its proper divisors (3698867).

18494305 is an equidigital number, since it uses as much as digits as its factorization.

18494305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698866.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18494305 is about 4300.5005522613. The cubic root of 18494305 is about 264.4514820069.

It can be divided in two parts, 1849430 and 5, that multiplied together give a triangular number (9247150 = T₄₃₀₀).

The spelling of 18494305 in words is "eighteen million, four hundred ninety-four thousand, three hundred five".