18123017 has 12 divisors (see below), whose sum is σ = 20971440. Its totient is φ = 15606360.

The previous prime is 18122989. The next prime is 18123041. The reversal of 18123017 is 71032181.

It is a happy number.

It is not a de Polignac number, because 18123017 - 2¹⁰ = 18121993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18122983 and 18123001.

It is not an unprimeable number, because it can be changed into a prime (18123047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1643 + ... + 6240.

It is an arithmetic number, because the mean of its divisors is an integer number (1747620).

Almost surely, 2^18123017 is an apocalyptic number.

It is an amenable number.

18123017 is a deficient number, since it is larger than the sum of its proper divisors (2848423).

18123017 is a wasteful number, since it uses less digits than its factorization.

18123017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7924 (or 7913 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 18123017 is about 4257.1136935722. The cubic root of 18123017 is about 262.6698136295.

Adding to 18123017 its reverse (71032181), we get a palindrome (89155198).

The spelling of 18123017 in words is "eighteen million, one hundred twenty-three thousand, seventeen".