20540505213001 has 8 divisors (see below), whose sum is σ = 20545108171560. Its totient is φ = 20535902779392.

The previous prime is 20540505212987. The next prime is 20540505213029. The reversal of 20540505213001 is 10031250504502.

It can be written as a sum of positive squares in 4 ways, for example, as 286545019401 + 20253960193600 = 535299^2 + 4500440^2 .

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 20540505213001 - 2³¹ = 20538357729353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20540505213071) 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 7 ways as a sum of consecutive naturals, for example, 84076641 + ... + 84320593.

It is an arithmetic number, because the mean of its divisors is an integer number (2568138521445).

Almost surely, 2^{20540505213001} is an apocalyptic number.

It is an amenable number.

20540505213001 is a deficient number, since it is larger than the sum of its proper divisors (4602958559).

20540505213001 is a wasteful number, since it uses less digits than its factorization.

20540505213001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262475.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 20540505213001 its reverse (10031250504502), we get a palindrome (30571755717503).

The spelling of 20540505213001 in words is "twenty trillion, five hundred forty billion, five hundred five million, two hundred thirteen thousand, one".