18380235 has 16 divisors (see below), whose sum is σ = 29461536. Its totient is φ = 9785088.

The previous prime is 18380233. The next prime is 18380249. The reversal of 18380235 is 53208381.

It is a happy number.

It is not a de Polignac number, because 18380235 - 2¹ = 18380233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18380233) 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 15 ways as a sum of consecutive naturals, for example, 15897 + ... + 17013.

It is an arithmetic number, because the mean of its divisors is an integer number (1841346).

Almost surely, 2^18380235 is an apocalyptic number.

18380235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18380235 is a deficient number, since it is larger than the sum of its proper divisors (11081301).

18380235 is a wasteful number, since it uses less digits than its factorization.

18380235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 18380235 is about 4287.2176291856. The cubic root of 18380235 is about 263.9066617926.

The spelling of 18380235 in words is "eighteen million, three hundred eighty thousand, two hundred thirty-five".