2101020018 has 16 divisors (see below), whose sum is σ = 4225517280. Its totient is φ = 696427136.

The previous prime is 2101019993. The next prime is 2101020023. The reversal of 2101020018 is 8100201012.

It is a junction number, because it is equal to n+sod(n) for n = 2101019979 and 2101020006.

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, 977055 + ... + 979202.

It is an arithmetic number, because the mean of its divisors is an integer number (264094830).

Almost surely, 2^2101020018 is an apocalyptic number.

2101020018 is an abundant number, since it is smaller than the sum of its proper divisors (2124497262).

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

2101020018 is a wasteful number, since it uses less digits than its factorization.

2101020018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956441.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2101020018 is about 45836.8849072447. The cubic root of 2101020018 is about 1280.7864669510.

The spelling of 2101020018 in words is "two billion, one hundred one million, twenty thousand, eighteen".