20553013663 has 16 divisors (see below), whose sum is σ = 25332181056. Its totient is φ = 16238476800.

The previous prime is 20553013639. The next prime is 20553013667. The reversal of 20553013663 is 36631035502.

It is not a de Polignac number, because 20553013663 - 2²¹ = 20550916511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553013667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97306 + ... + 224887.

It is an arithmetic number, because the mean of its divisors is an integer number (1583261316).

Almost surely, 2^20553013663 is an apocalyptic number.

20553013663 is a deficient number, since it is larger than the sum of its proper divisors (4779167393).

20553013663 is a wasteful number, since it uses less digits than its factorization.

20553013663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322914.

The product of its (nonzero) digits is 48600, while the sum is 34.

The spelling of 20553013663 in words is "twenty billion, five hundred fifty-three million, thirteen thousand, six hundred sixty-three".