2021820093 has 12 divisors (see below), whose sum is σ = 3014613888. Its totient is φ = 1304399880.

The previous prime is 2021820079. The next prime is 2021820133. The reversal of 2021820093 is 3900281202.

It is a happy number.

It is not a de Polignac number, because 2021820093 - 2¹⁴ = 2021803709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021820023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3623055 + ... + 3623612.

It is an arithmetic number, because the mean of its divisors is an integer number (251217824).

Almost surely, 2^2021820093 is an apocalyptic number.

It is an amenable number.

2021820093 is a deficient number, since it is larger than the sum of its proper divisors (992793795).

2021820093 is a wasteful number, since it uses less digits than its factorization.

2021820093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246704 (or 7246701 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2021820093 is about 44964.6538183049. The cubic root of 2021820093 is about 1264.4864195447.

The spelling of 2021820093 in words is "two billion, twenty-one million, eight hundred twenty thousand, ninety-three".