20020531543 has 2 divisors, whose sum is σ = 20020531544. Its totient is φ = 20020531542.

The previous prime is 20020531529. The next prime is 20020531547. The reversal of 20020531543 is 34513502002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20020531543 - 2⁵ = 20020531511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020531547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010265771 + 10010265772.

It is an arithmetic number, because the mean of its divisors is an integer number (10010265772).

Almost surely, 2^20020531543 is an apocalyptic number.

20020531543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020531543 is an equidigital number, since it uses as much as digits as its factorization.

20020531543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 20020531543 in words is "twenty billion, twenty million, five hundred thirty-one thousand, five hundred forty-three".