18043011 has 12 divisors (see below), whose sum is σ = 29785392. Its totient is φ = 10310256.

The previous prime is 18043009. The next prime is 18043019. The reversal of 18043011 is 11034081.

It is not a de Polignac number, because 18043011 - 2¹ = 18043009 is a prime.

It is a super-2 number, since 2×18043011² = 651100491892242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18043019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143136 + ... + 143261.

It is an arithmetic number, because the mean of its divisors is an integer number (2482116).

Almost surely, 2^18043011 is an apocalyptic number.

18043011 is a deficient number, since it is larger than the sum of its proper divisors (11742381).

18043011 is a wasteful number, since it uses less digits than its factorization.

18043011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286410 (or 286407 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18043011 is about 4247.7065576614. The cubic root of 18043011 is about 262.2827154303.

Adding to 18043011 its reverse (11034081), we get a palindrome (29077092).

The spelling of 18043011 in words is "eighteen million, forty-three thousand, eleven".