18361418 has 8 divisors (see below), whose sum is σ = 27609120. Its totient is φ = 9158380.

The previous prime is 18361351. The next prime is 18361423. The reversal of 18361418 is 81416381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10118 + ... + 11793.

It is an arithmetic number, because the mean of its divisors is an integer number (3451140).

Almost surely, 2^18361418 is an apocalyptic number.

18361418 is a deficient number, since it is larger than the sum of its proper divisors (9247702).

18361418 is a wasteful number, since it uses less digits than its factorization.

18361418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22332.

The product of its digits is 4608, while the sum is 32.

The square root of 18361418 is about 4285.0225203609. The cubic root of 18361418 is about 263.8165717717.

Adding to 18361418 its reverse (81416381), we get a palindrome (99777799).

The spelling of 18361418 in words is "eighteen million, three hundred sixty-one thousand, four hundred eighteen".