20503540050505 has 16 divisors (see below), whose sum is σ = 24614356717440. Its totient is φ = 16396093761408.

The previous prime is 20503540050503. The next prime is 20503540050509. The reversal of 20503540050505 is 50505004530502.

It is a cyclic number.

It is not a de Polignac number, because 20503540050505 - 2¹ = 20503540050503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20503540050503) 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, 245101476 + ... + 245185114.

It is an arithmetic number, because the mean of its divisors is an integer number (1538397294840).

Almost surely, 2^{20503540050505} is an apocalyptic number.

It is an amenable number.

20503540050505 is a deficient number, since it is larger than the sum of its proper divisors (4110816666935).

20503540050505 is a wasteful number, since it uses less digits than its factorization.

20503540050505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103200.

The product of its (nonzero) digits is 75000, while the sum is 34.

The spelling of 20503540050505 in words is "twenty trillion, five hundred three billion, five hundred forty million, fifty thousand, five hundred five".