18043155011 has 32 divisors (see below), whose sum is σ = 22032984960. Its totient is φ = 14449204224.

The previous prime is 18043154981. The next prime is 18043155017. The reversal of 18043155011 is 11055134081.

It is not a de Polignac number, because 18043155011 - 2¹⁰ = 18043153987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (18043155017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773921 + ... + 796893.

It is an arithmetic number, because the mean of its divisors is an integer number (688530780).

Almost surely, 2^18043155011 is an apocalyptic number.

18043155011 is a deficient number, since it is larger than the sum of its proper divisors (3989829949).

18043155011 is a wasteful number, since it uses less digits than its factorization.

18043155011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23135.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 18043155011 its reverse (11055134081), we get a palindrome (29098289092).

The spelling of 18043155011 in words is "eighteen billion, forty-three million, one hundred fifty-five thousand, eleven".