43330440021 has 32 divisors (see below), whose sum is σ = 66757239936. Its totient is φ = 24707328000.

The previous prime is 43330439969. The next prime is 43330440029. The reversal of 43330440021 is 12004403334.

It is not a de Polignac number, because 43330440021 - 2¹⁰ = 43330438997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43330439973 and 43330440000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43330440029) 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, 1772401 + ... + 1796681.

It is an arithmetic number, because the mean of its divisors is an integer number (2086163748).

Almost surely, 2^43330440021 is an apocalyptic number.

It is an amenable number.

43330440021 is a deficient number, since it is larger than the sum of its proper divisors (23426799915).

43330440021 is a wasteful number, since it uses less digits than its factorization.

43330440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27493.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 43330440021 its reverse (12004403334), we get a palindrome (55334843355).

The spelling of 43330440021 in words is "forty-three billion, three hundred thirty million, four hundred forty thousand, twenty-one".