20430120143 has 4 divisors (see below), whose sum is σ = 20628470928. Its totient is φ = 20231769360.

The previous prime is 20430120097. The next prime is 20430120149. The reversal of 20430120143 is 34102103402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34102103402 = 2 ⋅17051051701.

It is a cyclic number.

It is not a de Polignac number, because 20430120143 - 2¹⁰ = 20430119119 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 (20430120149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99175238 + ... + 99175443.

It is an arithmetic number, because the mean of its divisors is an integer number (5157117732).

Almost surely, 2^20430120143 is an apocalyptic number.

20430120143 is a deficient number, since it is larger than the sum of its proper divisors (198350785).

20430120143 is a wasteful number, since it uses less digits than its factorization.

20430120143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198350784.

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

Adding to 20430120143 its reverse (34102103402), we get a palindrome (54532223545).

The spelling of 20430120143 in words is "twenty billion, four hundred thirty million, one hundred twenty thousand, one hundred forty-three".