20455004543 has 2 divisors, whose sum is σ = 20455004544. Its totient is φ = 20455004542.

The previous prime is 20455004533. The next prime is 20455004551. The reversal of 20455004543 is 34540055402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20455004543 - 2¹⁰ = 20455003519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20455004513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227502271 + 10227502272.

It is an arithmetic number, because the mean of its divisors is an integer number (10227502272).

Almost surely, 2^20455004543 is an apocalyptic number.

20455004543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20455004543 is an equidigital number, since it uses as much as digits as its factorization.

20455004543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 32.

Adding to 20455004543 its reverse (34540055402), we get a palindrome (54995059945).

The spelling of 20455004543 in words is "twenty billion, four hundred fifty-five million, four thousand, five hundred forty-three".