2001820018 has 16 divisors (see below), whose sum is σ = 3276393120. Its totient is φ = 909727200.

The previous prime is 2001820001. The next prime is 2001820061. The reversal of 2001820018 is 8100281002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194998 + ... + 205006.

It is an arithmetic number, because the mean of its divisors is an integer number (204774570).

Almost surely, 2^2001820018 is an apocalyptic number.

2001820018 is a deficient number, since it is larger than the sum of its proper divisors (1274573102).

2001820018 is a wasteful number, since it uses less digits than its factorization.

2001820018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19113.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 2001820018 is about 44741.7033426310. The cubic root of 2001820018 is about 1260.3031138560.

The spelling of 2001820018 in words is "two billion, one million, eight hundred twenty thousand, eighteen".