20018350165 has 16 divisors (see below), whose sum is σ = 26208587520. Its totient is φ = 14557273920.

The previous prime is 20018350159. The next prime is 20018350169. The reversal of 20018350165 is 56105381002.

It is not a de Polignac number, because 20018350165 - 2¹¹ = 20018348117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018350169) 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 15 ways as a sum of consecutive naturals, for example, 1039252 + ... + 1058338.

It is an arithmetic number, because the mean of its divisors is an integer number (1638036720).

Almost surely, 2^20018350165 is an apocalyptic number.

It is an amenable number.

20018350165 is a deficient number, since it is larger than the sum of its proper divisors (6190237355).

20018350165 is a wasteful number, since it uses less digits than its factorization.

20018350165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38172.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 20018350165 in words is "twenty billion, eighteen million, three hundred fifty thousand, one hundred sixty-five".