20003141321 has 4 divisors (see below), whose sum is σ = 20019418500. Its totient is φ = 19986864144.

The previous prime is 20003141303. The next prime is 20003141329. The reversal of 20003141321 is 12314130002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16526388025 + 3476753296 = 128555^2 + 58964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003141321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20003141321.

It is not an unprimeable number, because it can be changed into a prime (20003141329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8136746 + ... + 8139203.

It is an arithmetic number, because the mean of its divisors is an integer number (5004854625).

Almost surely, 2^20003141321 is an apocalyptic number.

It is an amenable number.

20003141321 is a deficient number, since it is larger than the sum of its proper divisors (16277179).

20003141321 is a wasteful number, since it uses less digits than its factorization.

20003141321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16277178.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20003141321 its reverse (12314130002), we get a palindrome (32317271323).

The spelling of 20003141321 in words is "twenty billion, three million, one hundred forty-one thousand, three hundred twenty-one".