20331475405 has 16 divisors (see below), whose sum is σ = 24779732544. Its totient is φ = 16011936640.

The previous prime is 20331475403. The next prime is 20331475427. The reversal of 20331475405 is 50457413302.

It is not a de Polignac number, because 20331475405 - 2¹ = 20331475403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331475403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29442 + ... + 203788.

It is an arithmetic number, because the mean of its divisors is an integer number (1548733284).

Almost surely, 2^20331475405 is an apocalyptic number.

It is an amenable number.

20331475405 is a deficient number, since it is larger than the sum of its proper divisors (4448257139).

20331475405 is a wasteful number, since it uses less digits than its factorization.

20331475405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174716.

The product of its (nonzero) digits is 50400, while the sum is 34.

Adding to 20331475405 its reverse (50457413302), we get a palindrome (70788888707).

The spelling of 20331475405 in words is "twenty billion, three hundred thirty-one million, four hundred seventy-five thousand, four hundred five".