20320367405 has 16 divisors (see below), whose sum is σ = 27401915520. Its totient is φ = 14353382208.

The previous prime is 20320367377. The next prime is 20320367423. The reversal of 20320367405 is 50476302302.

It is not a de Polignac number, because 20320367405 - 2⁸ = 20320367149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6794615 + ... + 6797604.

It is an arithmetic number, because the mean of its divisors is an integer number (1712619720).

Almost surely, 2^20320367405 is an apocalyptic number.

It is an amenable number.

20320367405 is a deficient number, since it is larger than the sum of its proper divisors (7081548115).

20320367405 is a wasteful number, since it uses less digits than its factorization.

20320367405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13592260.

The product of its (nonzero) digits is 30240, while the sum is 32.

Adding to 20320367405 its reverse (50476302302), we get a palindrome (70796669707).

The spelling of 20320367405 in words is "twenty billion, three hundred twenty million, three hundred sixty-seven thousand, four hundred five".