20504621268193 has 4 divisors (see below), whose sum is σ = 20511458424000. Its totient is φ = 20497784112388.

The previous prime is 20504621268191. The next prime is 20504621268223. The reversal of 20504621268193 is 39186212640502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20504621268193 - 2¹ = 20504621268191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20504621268191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418573405 + ... + 3418579402.

It is an arithmetic number, because the mean of its divisors is an integer number (5127864606000).

Almost surely, 2^{20504621268193} is an apocalyptic number.

It is an amenable number.

20504621268193 is a deficient number, since it is larger than the sum of its proper divisors (6837155807).

20504621268193 is an equidigital number, since it uses as much as digits as its factorization.

20504621268193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6837155806.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 20504621268193 in words is "twenty trillion, five hundred four billion, six hundred twenty-one million, two hundred sixty-eight thousand, one hundred ninety-three".