18396601 has 4 divisors (see below), whose sum is σ = 19478772. Its totient is φ = 17314432.

The previous prime is 18396569. The next prime is 18396607. The reversal of 18396601 is 10669381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12418576 + 5978025 = 3524^2 + 2445^2 .

It is not a de Polignac number, because 18396601 - 2⁵ = 18396569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18396607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541060 + ... + 541093.

It is an arithmetic number, because the mean of its divisors is an integer number (4869693).

Almost surely, 2^18396601 is an apocalyptic number.

It is an amenable number.

18396601 is a deficient number, since it is larger than the sum of its proper divisors (1082171).

18396601 is a wasteful number, since it uses less digits than its factorization.

18396601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082170.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18396601 is about 4289.1259016261. The cubic root of 18396601 is about 263.9849671957.

The spelling of 18396601 in words is "eighteen million, three hundred ninety-six thousand, six hundred one".