20163120355 has 32 divisors (see below), whose sum is σ = 28081243008. Its totient is φ = 13613184000.

The previous prime is 20163120337. The next prime is 20163120371. The reversal of 20163120355 is 55302136102.

It is not a de Polignac number, because 20163120355 - 2⁵ = 20163120323 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 624079 + ... + 655591.

It is an arithmetic number, because the mean of its divisors is an integer number (877538844).

Almost surely, 2^20163120355 is an apocalyptic number.

20163120355 is a deficient number, since it is larger than the sum of its proper divisors (7918122653).

20163120355 is a wasteful number, since it uses less digits than its factorization.

20163120355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31807.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 20163120355 its reverse (55302136102), we get a palindrome (75465256457).

The spelling of 20163120355 in words is "twenty billion, one hundred sixty-three million, one hundred twenty thousand, three hundred fifty-five".