20271130563 has 16 divisors (see below), whose sum is σ = 27930583296. Its totient is φ = 13069106400.

The previous prime is 20271130559. The next prime is 20271130631. The reversal of 20271130563 is 36503117202.

It is not a de Polignac number, because 20271130563 - 2² = 20271130559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20271130563.

It is not an unprimeable number, because it can be changed into a prime (20271130163) 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, 764895 + ... + 790952.

It is an arithmetic number, because the mean of its divisors is an integer number (1745661456).

Almost surely, 2^20271130563 is an apocalyptic number.

20271130563 is a deficient number, since it is larger than the sum of its proper divisors (7659452733).

20271130563 is a wasteful number, since it uses less digits than its factorization.

20271130563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555994.

The product of its (nonzero) digits is 7560, while the sum is 30.

Adding to 20271130563 its reverse (36503117202), we get a palindrome (56774247765).

The spelling of 20271130563 in words is "twenty billion, two hundred seventy-one million, one hundred thirty thousand, five hundred sixty-three".