4234342021 has 16 divisors (see below), whose sum is σ = 5438087424. Its totient is φ = 3204584064.

The previous prime is 4234341983. The next prime is 4234342037. The reversal of 4234342021 is 1202434324.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4234342021 - 2⁷ = 4234341893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4234342081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1009456 + ... + 1013641.

It is an arithmetic number, because the mean of its divisors is an integer number (339880464).

Almost surely, 2^4234342021 is an apocalyptic number.

It is an amenable number.

4234342021 is a deficient number, since it is larger than the sum of its proper divisors (1203745403).

4234342021 is a wasteful number, since it uses less digits than its factorization.

4234342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023140.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 4234342021 is about 65071.8220199804. The cubic root of 4234342021 is about 1617.8142066577.

Adding to 4234342021 its reverse (1202434324), we get a palindrome (5436776345).

The spelling of 4234342021 in words is "four billion, two hundred thirty-four million, three hundred forty-two thousand, twenty-one".