20405133340052 has 48 divisors (see below), whose sum is σ = 38127128760000. Its totient is φ = 9539257668864.

The previous prime is 20405133340049. The next prime is 20405133340057. The reversal of 20405133340052 is 25004333150402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405133340057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21791177 + ... + 22708272.

It is an arithmetic number, because the mean of its divisors is an integer number (794315182500).

Almost surely, 2^{20405133340052} is an apocalyptic number.

It is an amenable number.

20405133340052 is a deficient number, since it is larger than the sum of its proper divisors (17721995419948).

20405133340052 is a wasteful number, since it uses less digits than its factorization.

20405133340052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44499608 (or 44499606 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 20405133340052 its reverse (25004333150402), we get a palindrome (45409466490454).

The spelling of 20405133340052 in words is "twenty trillion, four hundred five billion, one hundred thirty-three million, three hundred forty thousand, fifty-two".