18489146 has 8 divisors (see below), whose sum is σ = 29867124. Its totient is φ = 8533440.

The previous prime is 18489143. The next prime is 18489151. The reversal of 18489146 is 64198481.

It can be written as a sum of positive squares in 2 ways, for example, as 16313521 + 2175625 = 4039^2 + 1475^2 .

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 (18489143) 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 3 ways as a sum of consecutive naturals, for example, 355535 + ... + 355586.

Almost surely, 2^18489146 is an apocalyptic number.

18489146 is a deficient number, since it is larger than the sum of its proper divisors (11377978).

18489146 is a wasteful number, since it uses less digits than its factorization.

18489146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711136.

The product of its digits is 55296, while the sum is 41.

The square root of 18489146 is about 4299.9006965278. The cubic root of 18489146 is about 264.4268900749.

The spelling of 18489146 in words is "eighteen million, four hundred eighty-nine thousand, one hundred forty-six".