20001243143003 has 4 divisors (see below), whose sum is σ = 20006682701520. Its totient is φ = 19995803584488.

The previous prime is 20001243142987. The next prime is 20001243143023. The reversal of 20001243143003 is 30034134210002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001243143003 - 2⁴ = 20001243142987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001243143003.

It is not an unprimeable number, because it can be changed into a prime (20001243143023) 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, 2719773743 + ... + 2719781096.

It is an arithmetic number, because the mean of its divisors is an integer number (5001670675380).

Almost surely, 2^{20001243143003} is an apocalyptic number.

20001243143003 is a deficient number, since it is larger than the sum of its proper divisors (5439558517).

20001243143003 is an equidigital number, since it uses as much as digits as its factorization.

20001243143003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439558516.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20001243143003 its reverse (30034134210002), we get a palindrome (50035377353005).

The spelling of 20001243143003 in words is "twenty trillion, one billion, two hundred forty-three million, one hundred forty-three thousand, three".