18109234 has 32 divisors (see below), whose sum is σ = 33312384. Its totient is φ = 7265280.

The previous prime is 18109213. The next prime is 18109237. The reversal of 18109234 is 43290181.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (18109237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5202 + ... + 7954.

It is an arithmetic number, because the mean of its divisors is an integer number (1041012).

Almost surely, 2^18109234 is an apocalyptic number.

18109234 is a deficient number, since it is larger than the sum of its proper divisors (15203150).

18109234 is a wasteful number, since it uses less digits than its factorization.

18109234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18109234 is about 4255.4945658525. The cubic root of 18109234 is about 262.6032077911.

The spelling of 18109234 in words is "eighteen million, one hundred nine thousand, two hundred thirty-four".