40420304423 has 4 divisors (see below), whose sum is σ = 40711098120. Its totient is φ = 40129510728.

The previous prime is 40420304411. The next prime is 40420304447. The reversal of 40420304423 is 32440302404.

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 40420304423 - 2¹⁸ = 40420042279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40420304392 and 40420304401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420304453) 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, 145396640 + ... + 145396917.

It is an arithmetic number, because the mean of its divisors is an integer number (10177774530).

Almost surely, 2^40420304423 is an apocalyptic number.

40420304423 is a deficient number, since it is larger than the sum of its proper divisors (290793697).

40420304423 is a wasteful number, since it uses less digits than its factorization.

40420304423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290793696.

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 40420304423 its reverse (32440302404), we get a palindrome (72860606827).

The spelling of 40420304423 in words is "forty billion, four hundred twenty million, three hundred four thousand, four hundred twenty-three".