18561314 has 16 divisors (see below), whose sum is σ = 29597400. Its totient is φ = 8730112.

The previous prime is 18561313. The next prime is 18561379. The reversal of 18561314 is 41316581.

It can be written as a sum of positive squares in 4 ways, for example, as 16362025 + 2199289 = 4045^2 + 1483^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18561313) 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 7 ways as a sum of consecutive naturals, for example, 8882 + ... + 10770.

Almost surely, 2^18561314 is an apocalyptic number.

18561314 is a deficient number, since it is larger than the sum of its proper divisors (11036086).

18561314 is an equidigital number, since it uses as much as digits as its factorization.

18561314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 1908 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 18561314 is about 4308.2843453050. The cubic root of 18561314 is about 264.7704859814.

Adding to 18561314 its reverse (41316581), we get a palindrome (59877895).

The spelling of 18561314 in words is "eighteen million, five hundred sixty-one thousand, three hundred fourteen".