4003040021 has 16 divisors (see below), whose sum is σ = 4112726400. Its totient is φ = 3894770880.

The previous prime is 4003040017. The next prime is 4003040033. The reversal of 4003040021 is 1200403004.

It is a cyclic number.

It is not a de Polignac number, because 4003040021 - 2² = 4003040017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4003039978 and 4003040005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4003040051) 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 15 ways as a sum of consecutive naturals, for example, 5178191 + ... + 5178963.

It is an arithmetic number, because the mean of its divisors is an integer number (257045400).

Almost surely, 2^4003040021 is an apocalyptic number.

It is an amenable number.

4003040021 is a deficient number, since it is larger than the sum of its proper divisors (109686379).

4003040021 is a wasteful number, since it uses less digits than its factorization.

4003040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4003040021 is about 63269.5821149468. The cubic root of 4003040021 is about 1587.8030945117.

Adding to 4003040021 its reverse (1200403004), we get a palindrome (5203443025).

The spelling of 4003040021 in words is "four billion, three million, forty thousand, twenty-one".