20305624163 has 4 divisors (see below), whose sum is σ = 22151590008. Its totient is φ = 18459658320.

The previous prime is 20305624147. The next prime is 20305624187. The reversal of 20305624163 is 36142650302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20305624163 - 2⁴ = 20305624147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20305624363) 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 3 ways as a sum of consecutive naturals, for example, 922982906 + ... + 922982927.

It is an arithmetic number, because the mean of its divisors is an integer number (5537897502).

Almost surely, 2^20305624163 is an apocalyptic number.

20305624163 is a deficient number, since it is larger than the sum of its proper divisors (1845965845).

20305624163 is a wasteful number, since it uses less digits than its factorization.

20305624163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845965844.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20305624163 in words is "twenty billion, three hundred five million, six hundred twenty-four thousand, one hundred sixty-three".