20043021143 has 4 divisors (see below), whose sum is σ = 20065120200. Its totient is φ = 20020922088.

The previous prime is 20043021121. The next prime is 20043021161. The reversal of 20043021143 is 34112034002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34112034002 = 2 ⋅17056017001.

It is not a de Polignac number, because 20043021143 - 2²⁸ = 19774585687 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 (20043011143) 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, 11048168 + ... + 11049981.

It is an arithmetic number, because the mean of its divisors is an integer number (5016280050).

Almost surely, 2^20043021143 is an apocalyptic number.

20043021143 is a deficient number, since it is larger than the sum of its proper divisors (22099057).

20043021143 is an equidigital number, since it uses as much as digits as its factorization.

20043021143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22099056.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20043021143 its reverse (34112034002), we get a palindrome (54155055145).

The spelling of 20043021143 in words is "twenty billion, forty-three million, twenty-one thousand, one hundred forty-three".