2021404420 has 24 divisors (see below), whose sum is σ = 4851370944. Its totient is φ = 693052896.

The previous prime is 2021404417. The next prime is 2021404423. The reversal of 2021404420 is 244041202.

It is an interprime number because it is at equal distance from previous prime (2021404417) and next prime (2021404423).

It is not an unprimeable number, because it can be changed into a prime (2021404423) 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, 7219162 + ... + 7219441.

It is an arithmetic number, because the mean of its divisors is an integer number (202140456).

Almost surely, 2^2021404420 is an apocalyptic number.

2021404420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021404420 is an abundant number, since it is smaller than the sum of its proper divisors (2829966524).

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

2021404420 is a wasteful number, since it uses less digits than its factorization.

2021404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14438619 (or 14438617 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2021404420 is about 44960.0313611990. The cubic root of 2021404420 is about 1264.3997568902.

Adding to 2021404420 its reverse (244041202), we get a palindrome (2265445622).

The spelling of 2021404420 in words is "two billion, twenty-one million, four hundred four thousand, four hundred twenty".