40023421843 has 2 divisors, whose sum is σ = 40023421844. Its totient is φ = 40023421842.

The previous prime is 40023421829. The next prime is 40023421883. The reversal of 40023421843 is 34812432004.

It is a happy number.

40023421843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40023421843 - 2⁹ = 40023421331 is a prime.

It is not a weakly prime, because it can be changed into another prime (40023421883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011710921 + 20011710922.

It is an arithmetic number, because the mean of its divisors is an integer number (20011710922).

Almost surely, 2^40023421843 is an apocalyptic number.

40023421843 is a deficient number, since it is larger than the sum of its proper divisors (1).

40023421843 is an equidigital number, since it uses as much as digits as its factorization.

40023421843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 40023421843 its reverse (34812432004), we get a palindrome (74835853847).

The spelling of 40023421843 in words is "forty billion, twenty-three million, four hundred twenty-one thousand, eight hundred forty-three".