2021922 has 40 divisors (see below), whose sum is σ = 5180736. Its totient is φ = 577368.

The previous prime is 2021891. The next prime is 2021927. The reversal of 2021922 is 2291202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2021895 and 2021904.

It is not an unprimeable number, because it can be changed into a prime (2021927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 243 + ... + 2025.

2^2021922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2590368).

2021922 is an abundant number, since it is smaller than the sum of its proper divisors (3158814).

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

2021922 is a wasteful number, since it uses less digits than its factorization.

2021922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1795 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2021922 is about 1421.9430368338. The cubic root of 2021922 is about 126.4507664075.

The spelling of 2021922 in words is "two million, twenty-one thousand, nine hundred twenty-two".