20013654003563 has 16 divisors (see below), whose sum is σ = 22374393146592. Its totient is φ = 17895964759200.

The previous prime is 20013654003481. The next prime is 20013654003601. The reversal of 20013654003563 is 36530045631002.

It is not a de Polignac number, because 20013654003563 - 2²⁰ = 20013652954987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20013654003163) 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, 123169256 + ... + 123331637.

It is an arithmetic number, because the mean of its divisors is an integer number (1398399571662).

Almost surely, 2^{20013654003563} is an apocalyptic number.

20013654003563 is a deficient number, since it is larger than the sum of its proper divisors (2360739143029).

20013654003563 is an equidigital number, since it uses as much as digits as its factorization.

20013654003563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246500987 (or 246500965 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 20013654003563 its reverse (36530045631002), we get a palindrome (56543699634565).

The spelling of 20013654003563 in words is "twenty trillion, thirteen billion, six hundred fifty-four million, three thousand, five hundred sixty-three".