2021380 has 24 divisors (see below), whose sum is σ = 4273920. Its totient is φ = 803040.

The previous prime is 2021377. The next prime is 2021381. The reversal of 2021380 is 831202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2021381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3981 + ... + 4459.

It is an arithmetic number, because the mean of its divisors is an integer number (178080).

2^2021380 is an apocalyptic number.

2021380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021380 is an abundant number, since it is smaller than the sum of its proper divisors (2252540).

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

2021380 is a wasteful number, since it uses less digits than its factorization.

2021380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2021380 is about 1421.7524397728. The cubic root of 2021380 is about 126.4394665254.

Adding to 2021380 its reverse (831202), we get a palindrome (2852582).

It can be divided in two parts, 2021 and 380, that added together give a 4-th power (2401 = 7⁴).

The spelling of 2021380 in words is "two million, twenty-one thousand, three hundred eighty".