40120020443 has 4 divisors (see below), whose sum is σ = 40151888280. Its totient is φ = 40088152608.

The previous prime is 40120020431. The next prime is 40120020467. The reversal of 40120020443 is 34402002104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40120020443 - 2⁶ = 40120020379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40120025443) 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, 15932030 + ... + 15934547.

It is an arithmetic number, because the mean of its divisors is an integer number (10037972070).

Almost surely, 2^40120020443 is an apocalyptic number.

40120020443 is a deficient number, since it is larger than the sum of its proper divisors (31867837).

40120020443 is a wasteful number, since it uses less digits than its factorization.

40120020443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31867836.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 40120020443 its reverse (34402002104), we get a palindrome (74522022547).

The spelling of 40120020443 in words is "forty billion, one hundred twenty million, twenty thousand, four hundred forty-three".