18109276 has 12 divisors (see below), whose sum is σ = 31727808. Its totient is φ = 9044192.

The previous prime is 18109271. The next prime is 18109277. The reversal of 18109276 is 67290181.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18109271) 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, 2325 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (2643984).

Almost surely, 2^18109276 is an apocalyptic number.

It is an amenable number.

18109276 is a deficient number, since it is larger than the sum of its proper divisors (13618532).

18109276 is a wasteful number, since it uses less digits than its factorization.

18109276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5228 (or 5226 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 18109276 is about 4255.4995006462. The cubic root of 18109276 is about 262.6034108059.

The spelling of 18109276 in words is "eighteen million, one hundred nine thousand, two hundred seventy-six".