20543413541005 has 8 divisors (see below), whose sum is σ = 24700528661400. Its totient is φ = 16402442558016.

The previous prime is 20543413540987. The next prime is 20543413541011. The reversal of 20543413541005 is 50014531434502.

It can be written as a sum of positive squares in 4 ways, for example, as 1440945755236 + 19102467785769 = 1200394^2 + 4370637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20543413541005 - 2¹¹ = 20543413538957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4036031550 + ... + 4036036639.

It is an arithmetic number, because the mean of its divisors is an integer number (3087566082675).

Almost surely, 2^{20543413541005} is an apocalyptic number.

It is an amenable number.

20543413541005 is a deficient number, since it is larger than the sum of its proper divisors (4157115120395).

20543413541005 is an equidigital number, since it uses as much as digits as its factorization.

20543413541005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8072068703.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 20543413541005 its reverse (50014531434502), we get a palindrome (70557944975507).

The spelling of 20543413541005 in words is "twenty trillion, five hundred forty-three billion, four hundred thirteen million, five hundred forty-one thousand, five".