18011417 has 4 divisors (see below), whose sum is σ = 18179856. Its totient is φ = 17842980.

The previous prime is 18011401. The next prime is 18011419. The reversal of 18011417 is 71411081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18011417 - 2⁴ = 18011401 is a prime.

It is a super-2 number, since 2×18011417² = 648822284695778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18011392 and 18011401.

It is not an unprimeable number, because it can be changed into a prime (18011419) 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, 84059 + ... + 84272.

It is an arithmetic number, because the mean of its divisors is an integer number (4544964).

Almost surely, 2^18011417 is an apocalyptic number.

It is an amenable number.

18011417 is a deficient number, since it is larger than the sum of its proper divisors (168439).

18011417 is a wasteful number, since it uses less digits than its factorization.

18011417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168438.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 18011417 is about 4243.9859801842. The cubic root of 18011417 is about 262.1295369776.

Adding to 18011417 its reverse (71411081), we get a palindrome (89422498).

The spelling of 18011417 in words is "eighteen million, eleven thousand, four hundred seventeen".