20303556163 has 8 divisors (see below), whose sum is σ = 22512438576. Its totient is φ = 18155191200.

The previous prime is 20303556149. The next prime is 20303556181. The reversal of 20303556163 is 36165530302.

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-20303556163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20303556103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15128656 + ... + 15129997.

It is an arithmetic number, because the mean of its divisors is an integer number (2814054822).

Almost surely, 2^20303556163 is an apocalyptic number.

20303556163 is a deficient number, since it is larger than the sum of its proper divisors (2208882413).

20303556163 is a wasteful number, since it uses less digits than its factorization.

20303556163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30258725.

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

The spelling of 20303556163 in words is "twenty billion, three hundred three million, five hundred fifty-six thousand, one hundred sixty-three".