20305132066553 has 4 divisors (see below), whose sum is σ = 20305189956240. Its totient is φ = 20305074176868.

The previous prime is 20305132066529. The next prime is 20305132066567. The reversal of 20305132066553 is 35566023150302.

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 20305132066553 - 2¹⁰ = 20305132065529 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 20305132066553.

It is not an unprimeable number, because it can be changed into a prime (20305132066523) 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, 28415483 + ... + 29121296.

It is an arithmetic number, because the mean of its divisors is an integer number (5076297489060).

Almost surely, 2^{20305132066553} is an apocalyptic number.

It is an amenable number.

20305132066553 is a deficient number, since it is larger than the sum of its proper divisors (57889687).

20305132066553 is an equidigital number, since it uses as much as digits as its factorization.

20305132066553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57889686.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 20305132066553 in words is "twenty trillion, three hundred five billion, one hundred thirty-two million, sixty-six thousand, five hundred fifty-three".