40020204423 has 4 divisors (see below), whose sum is σ = 53360272568. Its totient is φ = 26680136280.

The previous prime is 40020204383. The next prime is 40020204449. The reversal of 40020204423 is 32440202004.

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

It is not a de Polignac number, because 40020204423 - 2¹³ = 40020196231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40020204423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020204473) 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 3 ways as a sum of consecutive naturals, for example, 6670034068 + ... + 6670034073.

It is an arithmetic number, because the mean of its divisors is an integer number (13340068142).

Almost surely, 2^40020204423 is an apocalyptic number.

40020204423 is a deficient number, since it is larger than the sum of its proper divisors (13340068145).

40020204423 is a wasteful number, since it uses less digits than its factorization.

40020204423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13340068144.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 40020204423 its reverse (32440202004), we get a palindrome (72460406427).

The spelling of 40020204423 in words is "forty billion, twenty million, two hundred four thousand, four hundred twenty-three".