18001011011 has 8 divisors (see below), whose sum is σ = 18042775920. Its totient is φ = 17959295392.

The previous prime is 18001010981. The next prime is 18001011029. The reversal of 18001011011 is 11011010081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18001011011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18001011071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776261 + ... + 799113.

It is an arithmetic number, because the mean of its divisors is an integer number (2255346990).

Almost surely, 2^18001011011 is an apocalyptic number.

18001011011 is a deficient number, since it is larger than the sum of its proper divisors (41764909).

18001011011 is a wasteful number, since it uses less digits than its factorization.

18001011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24645.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 18001011011 its reverse (11011010081), we get a palindrome (29012021092).

The spelling of 18001011011 in words is "eighteen billion, one million, eleven thousand, eleven".