18041331 has 16 divisors (see below), whose sum is σ = 29991168. Its totient is φ = 9372000.

The previous prime is 18041323. The next prime is 18041339. The reversal of 18041331 is 13314081.

It is an interprime number because it is at equal distance from previous prime (18041323) and next prime (18041339).

It is not a de Polignac number, because 18041331 - 2³ = 18041323 is a prime.

It is a super-2 number, since 2×18041331² = 650979248503122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 18041298 and 18041307.

It is not an unprimeable number, because it can be changed into a prime (18041339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38820 + ... + 39281.

It is an arithmetic number, because the mean of its divisors is an integer number (1874448).

Almost surely, 2^18041331 is an apocalyptic number.

18041331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18041331 is a deficient number, since it is larger than the sum of its proper divisors (11949837).

18041331 is a wasteful number, since it uses less digits than its factorization.

18041331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78122.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18041331 is about 4247.5087992846. The cubic root of 18041331 is about 262.2745747225.

The spelling of 18041331 in words is "eighteen million, forty-one thousand, three hundred thirty-one".