2100018 has 8 divisors (see below), whose sum is σ = 4200048. Its totient is φ = 700004.

The previous prime is 2100011. The next prime is 2100031. The reversal of 2100018 is 8100012.

It is a happy number.

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

2100018 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2099976 and 2100012.

It is not an unprimeable number, because it can be changed into a prime (2100011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174996 + ... + 175007.

It is an arithmetic number, because the mean of its divisors is an integer number (525006).

2^2100018 is an apocalyptic number.

2100018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2100018 is a wasteful number, since it uses less digits than its factorization.

2100018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350008.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2100018 is about 1449.1438851957. The cubic root of 2100018 is about 128.0582823775.

The spelling of 2100018 in words is "two million, one hundred thousand, eighteen".