20520120163 has 8 divisors (see below), whose sum is σ = 20673305280. Its totient is φ = 20366984640.

The previous prime is 20520120161. The next prime is 20520120211. The reversal of 20520120163 is 36102102502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20520120163 - 2¹ = 20520120161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20520120161) 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 7 ways as a sum of consecutive naturals, for example, 1476933 + ... + 1490761.

It is an arithmetic number, because the mean of its divisors is an integer number (2584163160).

Almost surely, 2^20520120163 is an apocalyptic number.

20520120163 is a deficient number, since it is larger than the sum of its proper divisors (153185117).

20520120163 is a wasteful number, since it uses less digits than its factorization.

20520120163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24797.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20520120163 its reverse (36102102502), we get a palindrome (56622222665).

The spelling of 20520120163 in words is "twenty billion, five hundred twenty million, one hundred twenty thousand, one hundred sixty-three".