18047841 has 16 divisors (see below), whose sum is σ = 27563904. Its totient is φ = 10289664.

The previous prime is 18047833. The next prime is 18047851. The reversal of 18047841 is 14874081.

It is not a de Polignac number, because 18047841 - 2³ = 18047833 is a prime.

It is a super-2 number, since 2×18047841² = 651449129522562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18047851) 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 15 ways as a sum of consecutive naturals, for example, 13495 + ... + 14771.

It is an arithmetic number, because the mean of its divisors is an integer number (1722744).

Almost surely, 2^18047841 is an apocalyptic number.

It is an amenable number.

18047841 is a deficient number, since it is larger than the sum of its proper divisors (9516063).

18047841 is a wasteful number, since it uses less digits than its factorization.

18047841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 18047841 is about 4248.2750617162. The cubic root of 18047841 is about 262.3061171506.

The spelling of 18047841 in words is "eighteen million, forty-seven thousand, eight hundred forty-one".