20003513164447 has 8 divisors (see below), whose sum is σ = 20548647219296. Its totient is φ = 19458615876192.

The previous prime is 20003513164429. The next prime is 20003513164457. The reversal of 20003513164447 is 74446131530002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003513164447 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 (20003513164457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59020368 + ... + 59358325.

It is an arithmetic number, because the mean of its divisors is an integer number (2568580902412).

Almost surely, 2^{20003513164447} is an apocalyptic number.

20003513164447 is a deficient number, since it is larger than the sum of its proper divisors (545134054849).

20003513164447 is a wasteful number, since it uses less digits than its factorization.

20003513164447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118383297.

The product of its (nonzero) digits is 241920, while the sum is 40.

Adding to 20003513164447 its reverse (74446131530002), we get a palindrome (94449644694449).

The spelling of 20003513164447 in words is "twenty trillion, three billion, five hundred thirteen million, one hundred sixty-four thousand, four hundred forty-seven".