18380116 has 12 divisors (see below), whose sum is σ = 32215540. Its totient is φ = 9175680.

The previous prime is 18380107. The next prime is 18380119. The reversal of 18380116 is 61108381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10562500 + 7817616 = 3250^2 + 2796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405 + ... + 6076.

Almost surely, 2^18380116 is an apocalyptic number.

It is an amenable number.

18380116 is a deficient number, since it is larger than the sum of its proper divisors (13835424).

18380116 is a wasteful number, since it uses less digits than its factorization.

18380116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7194 (or 7192 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18380116 is about 4287.2037506981. The cubic root of 18380116 is about 263.9060922504.

Adding to 18380116 its reverse (61108381), we get a palindrome (79488497).

It can be divided in two parts, 18380 and 116, that added together give a square (18496 = 136²).

The spelling of 18380116 in words is "eighteen million, three hundred eighty thousand, one hundred sixteen".