18045697 has 4 divisors (see below), whose sum is σ = 18429696. Its totient is φ = 17661700.

The previous prime is 18045679. The next prime is 18045739. The reversal of 18045697 is 79654081.

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 a de Polignac number, because none of the positive numbers 2^k-18045697 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18045607) 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, 191929 + ... + 192022.

It is an arithmetic number, because the mean of its divisors is an integer number (4607424).

Almost surely, 2^18045697 is an apocalyptic number.

It is an amenable number.

18045697 is a deficient number, since it is larger than the sum of its proper divisors (383999).

18045697 is an equidigital number, since it uses as much as digits as its factorization.

18045697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383998.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 18045697 is about 4248.0227165118. The cubic root of 18045697 is about 262.2957298216.

The spelling of 18045697 in words is "eighteen million, forty-five thousand, six hundred ninety-seven".