20143420243 has 4 divisors (see below), whose sum is σ = 20148456328. Its totient is φ = 20138384160.

The previous prime is 20143420211. The next prime is 20143420259. The reversal of 20143420243 is 34202434102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34202434102 = 2 ⋅17101217051.

It is a cyclic number.

It is not a de Polignac number, because 20143420243 - 2⁵ = 20143420211 is a prime.

It is a super-2 number, since 2×20143420243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20143420273) 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, 2512038 + ... + 2520043.

It is an arithmetic number, because the mean of its divisors is an integer number (5037114082).

Almost surely, 2^20143420243 is an apocalyptic number.

20143420243 is a deficient number, since it is larger than the sum of its proper divisors (5036085).

20143420243 is an equidigital number, since it uses as much as digits as its factorization.

20143420243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036084.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20143420243 its reverse (34202434102), we get a palindrome (54345854345).

The spelling of 20143420243 in words is "twenty billion, one hundred forty-three million, four hundred twenty thousand, two hundred forty-three".