20345025033503 has 16 divisors (see below), whose sum is σ = 22109459404800. Its totient is φ = 18650113129440.

The previous prime is 20345025033493. The next prime is 20345025033511. The reversal of 20345025033503 is 30533052054302.

It is a cyclic number.

It is not a de Polignac number, because 20345025033503 - 2¹⁸ = 20345024771359 is a prime.

It is a super-2 number, since 2×20345025033503² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345025033533) 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, 2448725 + ... + 6832737.

It is an arithmetic number, because the mean of its divisors is an integer number (1381841212800).

Almost surely, 2^{20345025033503} is an apocalyptic number.

20345025033503 is a deficient number, since it is larger than the sum of its proper divisors (1764434371297).

20345025033503 is a wasteful number, since it uses less digits than its factorization.

20345025033503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391942.

The product of its (nonzero) digits is 162000, while the sum is 35.

Adding to 20345025033503 its reverse (30533052054302), we get a palindrome (50878077087805).

The spelling of 20345025033503 in words is "twenty trillion, three hundred forty-five billion, twenty-five million, thirty-three thousand, five hundred three".