4021243220 has 96 divisors (see below), whose sum is σ = 9081502080. Its totient is φ = 1491125760.

The previous prime is 4021243207. The next prime is 4021243229. The reversal of 4021243220 is 223421204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 4021243192 and 4021243201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021243229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6559634 + ... + 6560246.

It is an arithmetic number, because the mean of its divisors is an integer number (94598980).

Almost surely, 2^4021243220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021243220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4540751040).

4021243220 is an abundant number, since it is smaller than the sum of its proper divisors (5060258860).

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

4021243220 is a wasteful number, since it uses less digits than its factorization.

4021243220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4021243220 is about 63413.2732162597. The cubic root of 4021243220 is about 1590.2062177318.

Adding to 4021243220 its reverse (223421204), we get a palindrome (4244664424).

The spelling of 4021243220 in words is "four billion, twenty-one million, two hundred forty-three thousand, two hundred twenty".