18080234 has 4 divisors (see below), whose sum is σ = 27120354. Its totient is φ = 9040116.

The previous prime is 18080233. The next prime is 18080243. The reversal of 18080234 is 43208081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12581209 + 5499025 = 3547^2 + 2345^2 .

It is a super-2 number, since 2×18080234² = 653789722989512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18080233) 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 as a sum of consecutive naturals, namely, 4520057 + ... + 4520060.

Almost surely, 2^18080234 is an apocalyptic number.

18080234 is a deficient number, since it is larger than the sum of its proper divisors (9040120).

18080234 is an equidigital number, since it uses as much as digits as its factorization.

18080234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040119.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 18080234 is about 4252.0858410902. The cubic root of 18080234 is about 262.4629559215.

The spelling of 18080234 in words is "eighteen million, eighty thousand, two hundred thirty-four".