18386146 has 8 divisors (see below), whose sum is σ = 29201580. Its totient is φ = 8652288.

The previous prime is 18386107. The next prime is 18386149. The reversal of 18386146 is 64168381.

It can be written as a sum of positive squares in 2 ways, for example, as 16851025 + 1535121 = 4105^2 + 1239^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18386149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270351 + ... + 270418.

Almost surely, 2^18386146 is an apocalyptic number.

18386146 is a deficient number, since it is larger than the sum of its proper divisors (10815434).

18386146 is a wasteful number, since it uses less digits than its factorization.

18386146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540788.

The product of its digits is 27648, while the sum is 37.

The square root of 18386146 is about 4287.9069486172. The cubic root of 18386146 is about 263.9349491546.

The spelling of 18386146 in words is "eighteen million, three hundred eighty-six thousand, one hundred forty-six".