2001118890 has 32 divisors (see below), whose sum is σ = 4815588096. Its totient is φ = 532198080.

The previous prime is 2001118879. The next prime is 2001118891. The reversal of 2001118890 is 988111002.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2001118891) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 78226 + ... + 100605.

It is an arithmetic number, because the mean of its divisors is an integer number (150487128).

Almost surely, 2^2001118890 is an apocalyptic number.

2001118890 is an abundant number, since it is smaller than the sum of its proper divisors (2814469206).

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

2001118890 is a wasteful number, since it uses less digits than its factorization.

2001118890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179214.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 2001118890 is about 44733.8673713776. The cubic root of 2001118890 is about 1260.1559582715.

Adding to 2001118890 its reverse (988111002), we get a palindrome (2989229892).

The spelling of 2001118890 in words is "two billion, one million, one hundred eighteen thousand, eight hundred ninety".