20505646273363 has 8 divisors (see below), whose sum is σ = 20516188049280. Its totient is φ = 20495104930560.

The previous prime is 20505646273337. The next prime is 20505646273367. The reversal of 20505646273363 is 36337264650502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20505646273363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20505646273363.

It is not an unprimeable number, because it can be changed into a prime (20505646273367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141667518 + ... + 141812188.

It is an arithmetic number, because the mean of its divisors is an integer number (2564523506160).

Almost surely, 2^{20505646273363} is an apocalyptic number.

20505646273363 is a deficient number, since it is larger than the sum of its proper divisors (10541775917).

20505646273363 is a wasteful number, since it uses less digits than its factorization.

20505646273363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216557.

The product of its (nonzero) digits is 16329600, while the sum is 52.

The spelling of 20505646273363 in words is "twenty trillion, five hundred five billion, six hundred forty-six million, two hundred seventy-three thousand, three hundred sixty-three".