18271042 has 4 divisors (see below), whose sum is σ = 27406566. Its totient is φ = 9135520.

The previous prime is 18271037. The next prime is 18271051. The reversal of 18271042 is 24017281.

It is a happy number.

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., 18156121 + 114921 = 4261^2 + 339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18270998 and 18271016.

It is an unprimeable number.

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, 4567759 + ... + 4567762.

Almost surely, 2^18271042 is an apocalyptic number.

18271042 is a deficient number, since it is larger than the sum of its proper divisors (9135524).

18271042 is an equidigital number, since it uses as much as digits as its factorization.

18271042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9135523.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18271042 is about 4274.4639429992. The cubic root of 18271042 is about 263.3830193415.

The spelling of 18271042 in words is "eighteen million, two hundred seventy-one thousand, forty-two".