18242086 has 4 divisors (see below), whose sum is σ = 27363132. Its totient is φ = 9121042.

The previous prime is 18242083. The next prime is 18242087. The reversal of 18242086 is 68024281.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18242083) 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 as a sum of consecutive naturals, namely, 4560520 + ... + 4560523.

It is an arithmetic number, because the mean of its divisors is an integer number (6840783).

Almost surely, 2^18242086 is an apocalyptic number.

18242086 is a deficient number, since it is larger than the sum of its proper divisors (9121046).

18242086 is an equidigital number, since it uses as much as digits as its factorization.

18242086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9121045.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 18242086 is about 4271.0755085809. The cubic root of 18242086 is about 263.2438090527.

The spelling of 18242086 in words is "eighteen million, two hundred forty-two thousand, eighty-six".