2001918 has 32 divisors (see below), whose sum is σ = 4239360. Its totient is φ = 629280.

The previous prime is 2001911. The next prime is 2001919. The reversal of 2001918 is 8191002.

It is a junction number, because it is equal to n+sod(n) for n = 2001894 and 2001903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8628 + ... + 8856.

It is an arithmetic number, because the mean of its divisors is an integer number (132480).

2^2001918 is an apocalyptic number.

2001918 is an abundant number, since it is smaller than the sum of its proper divisors (2237442).

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

2001918 is a wasteful number, since it uses less digits than its factorization.

2001918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 2001918 is about 1414.8915152760. The cubic root of 2001918 is about 126.0323675978.

The spelling of 2001918 in words is "two million, one thousand, nine hundred eighteen".