18141718 has 32 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 7491744.

The previous prime is 18141691. The next prime is 18141731. The reversal of 18141718 is 81714181.

It is a self number, because there is not a number n which added to its sum of digits gives 18141718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51808 + ... + 52156.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^18141718 is an apocalyptic number.

18141718 is a deficient number, since it is larger than the sum of its proper divisors (14114282).

18141718 is a wasteful number, since it uses less digits than its factorization.

18141718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its digits is 1792, while the sum is 31.

The square root of 18141718 is about 4259.3095684629. The cubic root of 18141718 is about 262.7601315484.

Adding to 18141718 its reverse (81714181), we get a palindrome (99855899).

The spelling of 18141718 in words is "eighteen million, one hundred forty-one thousand, seven hundred eighteen".