4231220020 has 24 divisors (see below), whose sum is σ = 9053216424. Its totient is φ = 1660553856.

The previous prime is 4231219997. The next prime is 4231220023. The reversal of 4231220020 is 200221324.

It can be written as a sum of positive squares in 4 ways, for example, as 16353936 + 4214866084 = 4044^2 + 64922^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4231219976 and 4231220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4231220023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994799 + ... + 1996918.

It is an arithmetic number, because the mean of its divisors is an integer number (377217351).

Almost surely, 2^4231220020 is an apocalyptic number.

It is an amenable number.

4231220020 is an abundant number, since it is smaller than the sum of its proper divisors (4821996404).

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

4231220020 is a wasteful number, since it uses less digits than its factorization.

4231220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991779 (or 3991777 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4231220020 is about 65047.8287108801. The cubic root of 4231220020 is about 1617.4165014664.

Adding to 4231220020 its reverse (200221324), we get a palindrome (4431441344).

The spelling of 4231220020 in words is "four billion, two hundred thirty-one million, two hundred twenty thousand, twenty".