4044020240421 has 32 divisors (see below), whose sum is σ = 6847717873920. Its totient is φ = 2310632635392.

The previous prime is 4044020240413. The next prime is 4044020240459. The reversal of 4044020240421 is 1240420204404.

It is not a de Polignac number, because 4044020240421 - 2³ = 4044020240413 is a prime.

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 (4044020340421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770421 + ... + 2946453.

It is an arithmetic number, because the mean of its divisors is an integer number (213991183560).

Almost surely, 2^{4044020240421} is an apocalyptic number.

It is an amenable number.

4044020240421 is a deficient number, since it is larger than the sum of its proper divisors (2803697633499).

4044020240421 is a wasteful number, since it uses less digits than its factorization.

4044020240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185882 (or 2185876 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 4044020240421 its reverse (1240420204404), we get a palindrome (5284440444825).

The spelling of 4044020240421 in words is "four trillion, forty-four billion, twenty million, two hundred forty thousand, four hundred twenty-one".