18441281 has 16 divisors (see below), whose sum is σ = 19783104. Its totient is φ = 17164224.

The previous prime is 18441271. The next prime is 18441301. The reversal of 18441281 is 18214481.

It is a happy number.

It is not a de Polignac number, because 18441281 - 2¹⁴ = 18424897 is a prime.

It is a super-2 number, since 2×18441281² = 680161689841922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18441271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106511 + ... + 106683.

It is an arithmetic number, because the mean of its divisors is an integer number (1236444).

Almost surely, 2^18441281 is an apocalyptic number.

It is an amenable number.

18441281 is a deficient number, since it is larger than the sum of its proper divisors (1341823).

18441281 is a wasteful number, since it uses less digits than its factorization.

18441281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its digits is 2048, while the sum is 29.

The square root of 18441281 is about 4294.3312634216. The cubic root of 18441281 is about 264.1985086799.

It can be divided in two parts, 1844 and 1281, that added together give a 5-th power (3125 = 5⁵).

The spelling of 18441281 in words is "eighteen million, four hundred forty-one thousand, two hundred eighty-one".