18445386 has 16 divisors (see below), whose sum is σ = 36939168. Its totient is φ = 6140400.

The previous prime is 18445381. The next prime is 18445393. The reversal of 18445386 is 68354481.

It is not an unprimeable number, because it can be changed into a prime (18445381) 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 in 7 ways as a sum of consecutive naturals, for example, 4621 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (2308698).

Almost surely, 2^18445386 is an apocalyptic number.

18445386 is an abundant number, since it is smaller than the sum of its proper divisors (18493782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18445386 is a wasteful number, since it uses less digits than its factorization.

18445386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037.

The product of its digits is 92160, while the sum is 39.

The square root of 18445386 is about 4294.8091925020. The cubic root of 18445386 is about 264.2181106157.

The spelling of 18445386 in words is "eighteen million, four hundred forty-five thousand, three hundred eighty-six".