18145234 has 8 divisors (see below), whose sum is σ = 27235980. Its totient is φ = 9066576.

The previous prime is 18145223. The next prime is 18145249. The reversal of 18145234 is 43254181.

It can be written as a sum of positive squares in 2 ways, for example, as 15093225 + 3052009 = 3885^2 + 1747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3952 + ... + 7204.

Almost surely, 2^18145234 is an apocalyptic number.

18145234 is a deficient number, since it is larger than the sum of its proper divisors (9090746).

18145234 is a wasteful number, since it uses less digits than its factorization.

18145234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6044.

The product of its digits is 3840, while the sum is 28.

The square root of 18145234 is about 4259.7222914176. The cubic root of 18145234 is about 262.7771054084. Note that the first 3 decimals are identical.

The spelling of 18145234 in words is "eighteen million, one hundred forty-five thousand, two hundred thirty-four".