20541322543 has 16 divisors (see below), whose sum is σ = 24295610880. Its totient is φ = 16992503136.

The previous prime is 20541322537. The next prime is 20541322567. The reversal of 20541322543 is 34522314502.

It is not a de Polignac number, because 20541322543 - 2¹³ = 20541314351 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 (20541322643) 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 15 ways as a sum of consecutive naturals, for example, 487896 + ... + 528322.

It is an arithmetic number, because the mean of its divisors is an integer number (1518475680).

Almost surely, 2^20541322543 is an apocalyptic number.

20541322543 is a deficient number, since it is larger than the sum of its proper divisors (3754288337).

20541322543 is a wasteful number, since it uses less digits than its factorization.

20541322543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42966.

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 20541322543 in words is "twenty billion, five hundred forty-one million, three hundred twenty-two thousand, five hundred forty-three".