4202340021 has 40 divisors (see below), whose sum is σ = 6919000704. Its totient is φ = 2520564480.

The previous prime is 4202340013. The next prime is 4202340137. The reversal of 4202340021 is 1200432024.

It is not a de Polignac number, because 4202340021 - 2³ = 4202340013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4202339976 and 4202340003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4202340011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62116 + ... + 110738.

Almost surely, 2^4202340021 is an apocalyptic number.

It is an amenable number.

4202340021 is a deficient number, since it is larger than the sum of its proper divisors (2716660683).

4202340021 is a wasteful number, since it uses less digits than its factorization.

4202340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48743 (or 48734 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4202340021 is about 64825.4581241043. The cubic root of 4202340021 is about 1613.7282298315.

Adding to 4202340021 its reverse (1200432024), we get a palindrome (5402772045).

The spelling of 4202340021 in words is "four billion, two hundred two million, three hundred forty thousand, twenty-one".