20013222543 has 4 divisors (see below), whose sum is σ = 26684296728. Its totient is φ = 13342148360.

The previous prime is 20013222533. The next prime is 20013222563. The reversal of 20013222543 is 34522231002.

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

It is a cyclic number.

It is not a de Polignac number, because 20013222543 - 2¹⁰ = 20013221519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013222503) 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, 3335537088 + ... + 3335537093.

It is an arithmetic number, because the mean of its divisors is an integer number (6671074182).

Almost surely, 2^20013222543 is an apocalyptic number.

20013222543 is a deficient number, since it is larger than the sum of its proper divisors (6671074185).

20013222543 is an equidigital number, since it uses as much as digits as its factorization.

20013222543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671074184.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20013222543 its reverse (34522231002), we get a palindrome (54535453545).

It can be divided in two parts, 20013 and 222543, that added together give a triangular number (242556 = T₆₉₆).

The spelling of 20013222543 in words is "twenty billion, thirteen million, two hundred twenty-two thousand, five hundred forty-three".