4234420021 has 8 divisors (see below), whose sum is σ = 4657169664. Its totient is φ = 3825531120.

The previous prime is 4234420019. The next prime is 4234420063. The reversal of 4234420021 is 1200244324.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4234420021 - 2¹ = 4234420019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4234419974 and 4234420001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4234420081) 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, 3464545 + ... + 3465766.

It is an arithmetic number, because the mean of its divisors is an integer number (582146208).

Almost surely, 2^4234420021 is an apocalyptic number.

It is an amenable number.

4234420021 is a deficient number, since it is larger than the sum of its proper divisors (422749643).

4234420021 is a wasteful number, since it uses less digits than its factorization.

4234420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930371.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4234420021 is about 65072.4213549796. The cubic root of 4234420021 is about 1617.8241404115.

Adding to 4234420021 its reverse (1200244324), we get a palindrome (5434664345).

The spelling of 4234420021 in words is "four billion, two hundred thirty-four million, four hundred twenty thousand, twenty-one".