18438482 has 4 divisors (see below), whose sum is σ = 27657726. Its totient is φ = 9219240.

The previous prime is 18438481. The next prime is 18438491. The reversal of 18438482 is 28483481.

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

It can be written as a sum of positive squares in only one way, i.e., 16008001 + 2430481 = 4001^2 + 1559^2 .

It is not an unprimeable number, because it can be changed into a prime (18438481) 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, 4609619 + ... + 4609622.

Almost surely, 2^18438482 is an apocalyptic number.

18438482 is a deficient number, since it is larger than the sum of its proper divisors (9219244).

18438482 is an equidigital number, since it uses as much as digits as its factorization.

18438482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9219243.

The product of its digits is 49152, while the sum is 38.

The square root of 18438482 is about 4294.0053563078. The cubic root of 18438482 is about 264.1851414046.

The spelling of 18438482 in words is "eighteen million, four hundred thirty-eight thousand, four hundred eighty-two".