4004403432021 has 16 divisors (see below), whose sum is σ = 5999106268800. Its totient is φ = 2639606755104.

The previous prime is 4004403432017. The next prime is 4004403432053. The reversal of 4004403432021 is 1202343044004.

It is a happy number.

It is not a de Polignac number, because 4004403432021 - 2² = 4004403432017 is a prime.

It is a super-3 number, since 3×4004403432021³ (a number of 39 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004403432121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833206801 + ... + 833211606.

It is an arithmetic number, because the mean of its divisors is an integer number (374944141800).

Almost surely, 2^{4004403432021} is an apocalyptic number.

It is an amenable number.

4004403432021 is a deficient number, since it is larger than the sum of its proper divisors (1994702836779).

4004403432021 is a wasteful number, since it uses less digits than its factorization.

4004403432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666418505 (or 1666418499 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 4004403432021 its reverse (1202343044004), we get a palindrome (5206746476025).

The spelling of 4004403432021 in words is "four trillion, four billion, four hundred three million, four hundred thirty-two thousand, twenty-one".