20123224543 has 4 divisors (see below), whose sum is σ = 20123528368. Its totient is φ = 20122920720.

The previous prime is 20123224523. The next prime is 20123224559. The reversal of 20123224543 is 34542232102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123224543 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 (20123224523) 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, 5571 + ... + 200692.

It is an arithmetic number, because the mean of its divisors is an integer number (5030882092).

Almost surely, 2^20123224543 is an apocalyptic number.

20123224543 is a deficient number, since it is larger than the sum of its proper divisors (303825).

20123224543 is an equidigital number, since it uses as much as digits as its factorization.

20123224543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303824.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20123224543 its reverse (34542232102), we get a palindrome (54665456645).

The spelling of 20123224543 in words is "twenty billion, one hundred twenty-three million, two hundred twenty-four thousand, five hundred forty-three".