2001111018 has 16 divisors (see below), whose sum is σ = 4002962976. Its totient is φ = 666913520.

The previous prime is 2001111017. The next prime is 2001111023. The reversal of 2001111018 is 8101111002.

It is a junction number, because it is equal to n+sod(n) for n = 2001110988 and 2001111006.

It is not an unprimeable number, because it can be changed into a prime (2001111017) 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, 8005 + ... + 63767.

It is an arithmetic number, because the mean of its divisors is an integer number (250185186).

Almost surely, 2^2001111018 is an apocalyptic number.

2001111018 is an abundant number, since it is smaller than the sum of its proper divisors (2001851958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001111018 is a wasteful number, since it uses less digits than its factorization.

2001111018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61749.

The product of its (nonzero) digits is 16, while the sum is 15.

The square root of 2001111018 is about 44733.7793842640. The cubic root of 2001111018 is about 1260.1543058691.

Subtracting from 2001111018 its product of nonzero digits (16), we obtain a palindrome (2001111002).

The spelling of 2001111018 in words is "two billion, one million, one hundred eleven thousand, eighteen".