4003434004021 has 4 divisors (see below), whose sum is σ = 4019383940544. Its totient is φ = 3987484067500.

The previous prime is 4003434004007. The next prime is 4003434004051. The reversal of 4003434004021 is 1204004343004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4003434004021 - 2³⁹ = 3453678190133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4003434004001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7974967885 + ... + 7974968386.

It is an arithmetic number, because the mean of its divisors is an integer number (1004845985136).

Almost surely, 2^{4003434004021} is an apocalyptic number.

It is an amenable number.

4003434004021 is a deficient number, since it is larger than the sum of its proper divisors (15949936523).

4003434004021 is a wasteful number, since it uses less digits than its factorization.

4003434004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15949936522.

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

Adding to 4003434004021 its reverse (1204004343004), we get a palindrome (5207438347025).

The spelling of 4003434004021 in words is "four trillion, three billion, four hundred thirty-four million, four thousand, twenty-one".