18143113 has 6 divisors (see below), whose sum is σ = 18966794. Its totient is φ = 17353776.

The previous prime is 18143101. The next prime is 18143123. The reversal of 18143113 is 31134181.

It can be written as a sum of positive squares in only one way, i.e., 17909824 + 233289 = 4232^2 + 483^2 .

It is not a de Polignac number, because 18143113 - 2¹⁷ = 18012041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18143123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16620 + ... + 17677.

Almost surely, 2^18143113 is an apocalyptic number.

It is an amenable number.

18143113 is a deficient number, since it is larger than the sum of its proper divisors (823681).

18143113 is an equidigital number, since it uses as much as digits as its factorization.

18143113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34343 (or 34320 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 18143113 is about 4259.4733242503. The cubic root of 18143113 is about 262.7668663201.

Adding to 18143113 its reverse (31134181), we get a palindrome (49277294).

The spelling of 18143113 in words is "eighteen million, one hundred forty-three thousand, one hundred thirteen".