18033081 has 24 divisors (see below), whose sum is σ = 27446496. Its totient is φ = 10443840.

The previous prime is 18033079. The next prime is 18033083.

18033081 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (18033079) and next prime (18033083).

It is not a de Polignac number, because 18033081 - 2¹ = 18033079 is a prime.

It is a super-2 number, since 2×18033081² = 650384020705122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18033083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16941 + ... + 17973.

It is an arithmetic number, because the mean of its divisors is an integer number (1143604).

Almost surely, 2^18033081 is an apocalyptic number.

18033081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18033081 is a deficient number, since it is larger than the sum of its proper divisors (9413415).

18033081 is a wasteful number, since it uses less digits than its factorization.

18033081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 18033081 is about 4246.5375307420. The cubic root of 18033081 is about 262.2345906965.

It can be divided in two parts, 1803 and 3081, that added together give a palindrome (4884).

The spelling of 18033081 in words is "eighteen million, thirty-three thousand, eighty-one".