18249370 has 16 divisors (see below), whose sum is σ = 33388488. Its totient is φ = 7179840.

The previous prime is 18249353. The next prime is 18249377. The reversal of 18249370 is 7394281.

It can be written as a sum of positive squares in 4 ways, for example, as 13682601 + 4566769 = 3699^2 + 2137^2 .

It is not an unprimeable number, because it can be changed into a prime (18249377) 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 7 ways as a sum of consecutive naturals, for example, 14349 + ... + 15568.

Almost surely, 2^18249370 is an apocalyptic number.

18249370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18249370 is a deficient number, since it is larger than the sum of its proper divisors (15139118).

18249370 is a wasteful number, since it uses less digits than its factorization.

18249370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29985.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 18249370 is about 4271.9281360997. The cubic root of 18249370 is about 263.2788418289.

The spelling of 18249370 in words is "eighteen million, two hundred forty-nine thousand, three hundred seventy".