4021353220 has 24 divisors (see below), whose sum is σ = 8463339864. Its totient is φ = 1605017856.

The previous prime is 4021353197. The next prime is 4021353227. The reversal of 4021353220 is 223531204.

It can be written as a sum of positive squares in 4 ways, for example, as 829555204 + 3191798016 = 28802^2 + 56496^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4021353191 and 4021353200.

It is not an unprimeable number, because it can be changed into a prime (4021353227) 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, 210847 + ... + 229126.

It is an arithmetic number, because the mean of its divisors is an integer number (352639161).

Almost surely, 2^4021353220 is an apocalyptic number.

It is an amenable number.

4021353220 is an abundant number, since it is smaller than the sum of its proper divisors (4441986644).

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

4021353220 is a wasteful number, since it uses less digits than its factorization.

4021353220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440439 (or 440437 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 4021353220 is about 63414.1405366343. The cubic root of 4021353220 is about 1590.2207174839.

Adding to 4021353220 its reverse (223531204), we get a palindrome (4244884424).

The spelling of 4021353220 in words is "four billion, twenty-one million, three hundred fifty-three thousand, two hundred twenty".