20430120043 has 4 divisors (see below), whose sum is σ = 20467884208. Its totient is φ = 20392355880.

The previous prime is 20430120041. The next prime is 20430120097. The reversal of 20430120043 is 34002103402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34002103402 = 2 ⋅17001051701.

It is a cyclic number.

It is not a de Polignac number, because 20430120043 - 2¹ = 20430120041 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 20430120043.

It is not an unprimeable number, because it can be changed into a prime (20430120041) 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, 18881271 + ... + 18882352.

It is an arithmetic number, because the mean of its divisors is an integer number (5116971052).

Almost surely, 2^20430120043 is an apocalyptic number.

20430120043 is a deficient number, since it is larger than the sum of its proper divisors (37764165).

20430120043 is an equidigital number, since it uses as much as digits as its factorization.

20430120043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37764164.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20430120043 its reverse (34002103402), we get a palindrome (54432223445).

The spelling of 20430120043 in words is "twenty billion, four hundred thirty million, one hundred twenty thousand, forty-three".