20345201023503 has 8 divisors (see below), whose sum is σ = 27264634874928. Its totient is φ = 13494617260544.

The previous prime is 20345201023471. The next prime is 20345201023519. The reversal of 20345201023503 is 30532010254302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20345201023503 - 2⁵ = 20345201023471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345201023573) 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 7 ways as a sum of consecutive naturals, for example, 17212521426 + ... + 17212522607.

It is an arithmetic number, because the mean of its divisors is an integer number (3408079359366).

Almost surely, 2^{20345201023503} is an apocalyptic number.

20345201023503 is a deficient number, since it is larger than the sum of its proper divisors (6919433851425).

20345201023503 is a wasteful number, since it uses less digits than its factorization.

20345201023503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34425044233.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 20345201023503 its reverse (30532010254302), we get a palindrome (50877211277805).

The spelling of 20345201023503 in words is "twenty trillion, three hundred forty-five billion, two hundred one million, twenty-three thousand, five hundred three".