18442849 has 8 divisors (see below), whose sum is σ = 19478592. Its totient is φ = 17426640.

The previous prime is 18442817. The next prime is 18442859. The reversal of 18442849 is 94824481.

It is a happy number.

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

It is not a de Polignac number, because 18442849 - 2⁵ = 18442817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18442859) 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, 2922 + ... + 6739.

It is an arithmetic number, because the mean of its divisors is an integer number (2434824).

Almost surely, 2^18442849 is an apocalyptic number.

It is an amenable number.

18442849 is a deficient number, since it is larger than the sum of its proper divisors (1035743).

18442849 is an equidigital number, since it uses as much as digits as its factorization.

18442849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9767.

The product of its digits is 73728, while the sum is 40.

The square root of 18442849 is about 4294.5138258015. The cubic root of 18442849 is about 264.2059964374.

It can be divided in two parts, 18442 and 849, that added together give a palindrome (19291).

The spelling of 18442849 in words is "eighteen million, four hundred forty-two thousand, eight hundred forty-nine".