18485617 has 4 divisors (see below), whose sum is σ = 18878976. Its totient is φ = 18092260.

The previous prime is 18485611. The next prime is 18485627. The reversal of 18485617 is 71658481.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71658481 = 19 ⋅3771499.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18485617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18485617.

It is not an unprimeable number, because it can be changed into a prime (18485611) 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, 196609 + ... + 196702.

It is an arithmetic number, because the mean of its divisors is an integer number (4719744).

Almost surely, 2^18485617 is an apocalyptic number.

It is an amenable number.

18485617 is a deficient number, since it is larger than the sum of its proper divisors (393359).

18485617 is an equidigital number, since it uses as much as digits as its factorization.

18485617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393358.

The product of its digits is 53760, while the sum is 40.

The square root of 18485617 is about 4299.4903186308. The cubic root of 18485617 is about 264.4100653953.

The spelling of 18485617 in words is "eighteen million, four hundred eighty-five thousand, six hundred seventeen".