18305270 has 16 divisors (see below), whose sum is σ = 33753888. Its totient is φ = 7143360.

The previous prime is 18305257. The next prime is 18305279. The reversal of 18305270 is 7250381.

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 (18305279) 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, 21914 + ... + 22733.

It is an arithmetic number, because the mean of its divisors is an integer number (2109618).

Almost surely, 2^18305270 is an apocalyptic number.

18305270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18305270 is a deficient number, since it is larger than the sum of its proper divisors (15448618).

18305270 is a wasteful number, since it uses less digits than its factorization.

18305270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44695.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 18305270 is about 4278.4658465389. The cubic root of 18305270 is about 263.5473860004.

The spelling of 18305270 in words is "eighteen million, three hundred five thousand, two hundred seventy".