18690017 has 4 divisors (see below), whose sum is σ = 18739200. Its totient is φ = 18640836.

The previous prime is 18689989. The next prime is 18690019. The reversal of 18690017 is 71009681.

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 18690017 - 2¹⁰ = 18688993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18690019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24017 + ... + 24782.

It is an arithmetic number, because the mean of its divisors is an integer number (4684800).

Almost surely, 2^18690017 is an apocalyptic number.

It is an amenable number.

18690017 is a deficient number, since it is larger than the sum of its proper divisors (49183).

18690017 is an equidigital number, since it uses as much as digits as its factorization.

18690017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49182.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 18690017 is about 4323.1952303823. The cubic root of 18690017 is about 265.3810443328.

Adding to 18690017 its reverse (71009681), we get a palindrome (89699698).

The spelling of 18690017 in words is "eighteen million, six hundred ninety thousand, seventeen".