20531550303543 has 16 divisors (see below), whose sum is σ = 27722117376000. Its totient is φ = 13514344128480.

The previous prime is 20531550303541. The next prime is 20531550303599. The reversal of 20531550303543 is 34530305513502.

It is not a de Polignac number, because 20531550303543 - 2¹ = 20531550303541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531550303541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55843333 + ... + 56209793.

It is an arithmetic number, because the mean of its divisors is an integer number (1732632336000).

Almost surely, 2^{20531550303543} is an apocalyptic number.

20531550303543 is a deficient number, since it is larger than the sum of its proper divisors (7190567072457).

20531550303543 is a wasteful number, since it uses less digits than its factorization.

20531550303543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602942.

The product of its (nonzero) digits is 405000, while the sum is 39.

The spelling of 20531550303543 in words is "twenty trillion, five hundred thirty-one billion, five hundred fifty million, three hundred three thousand, five hundred forty-three".