20003513165743 has 4 divisors (see below), whose sum is σ = 20003567898600. Its totient is φ = 20003458432888.

The previous prime is 20003513165717. The next prime is 20003513165773. The reversal of 20003513165743 is 34756131530002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003513165743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003513165696 and 20003513165705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003513165773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26814505 + ... + 27550402.

It is an arithmetic number, because the mean of its divisors is an integer number (5000891974650).

Almost surely, 2^{20003513165743} is an apocalyptic number.

20003513165743 is a deficient number, since it is larger than the sum of its proper divisors (54732857).

20003513165743 is an equidigital number, since it uses as much as digits as its factorization.

20003513165743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54732856.

The product of its (nonzero) digits is 226800, while the sum is 40.

Adding to 20003513165743 its reverse (34756131530002), we get a palindrome (54759644695745).

The spelling of 20003513165743 in words is "twenty trillion, three billion, five hundred thirteen million, one hundred sixty-five thousand, seven hundred forty-three".