18380601 has 20 divisors (see below), whose sum is σ = 28204132. Its totient is φ = 11920608.

The previous prime is 18380591. The next prime is 18380603. The reversal of 18380601 is 10608381.

It can be written as a sum of positive squares in 2 ways, for example, as 17214201 + 1166400 = 4149^2 + 1080^2 .

It is not a de Polignac number, because 18380601 - 2⁵ = 18380569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18380603) 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 19 ways as a sum of consecutive naturals, for example, 70 + ... + 6063.

Almost surely, 2^18380601 is an apocalyptic number.

It is an amenable number.

18380601 is a deficient number, since it is larger than the sum of its proper divisors (9823531).

18380601 is an equidigital number, since it uses as much as digits as its factorization.

18380601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182 (or 6173 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18380601 is about 4287.2603140001. The cubic root of 18380601 is about 263.9084134785.

Adding to 18380601 its reverse (10608381), we get a palindrome (28988982).

It can be divided in two parts, 18380 and 601, that added together give a palindrome (18981).

The spelling of 18380601 in words is "eighteen million, three hundred eighty thousand, six hundred one".