2021354240 has 36 divisors (see below), whose sum is σ = 4841778144. Its totient is φ = 808541184.

The previous prime is 2021354221. The next prime is 2021354249. The reversal of 2021354240 is 424531202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2021354249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788312 + ... + 790871.

Almost surely, 2^2021354240 is an apocalyptic number.

2021354240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021354240 is an abundant number, since it is smaller than the sum of its proper divisors (2820423904).

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

2021354240 is an equidigital number, since it uses as much as digits as its factorization.

2021354240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579204 (or 1579190 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2021354240 is about 44959.4733065235. The cubic root of 2021354240 is about 1264.3892941802.

Adding to 2021354240 its reverse (424531202), we get a palindrome (2445885442).

The spelling of 2021354240 in words is "two billion, twenty-one million, three hundred fifty-four thousand, two hundred forty".