22166851851 has 16 divisors (see below), whose sum is σ = 33302315520. Its totient is φ = 14569760520.

The previous prime is 22166851849. The next prime is 22166851853. The reversal of 22166851851 is 15815866122.

22166851851 is a `hidden beast` number, since 2 + 21 + 6 + 68 + 518 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (22166851849) and next prime (22166851853).

It is not a de Polignac number, because 22166851851 - 2¹ = 22166851849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22166851797 and 22166851806.

It is not an unprimeable number, because it can be changed into a prime (22166851853) 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, 5779735 + ... + 5783568.

It is an arithmetic number, because the mean of its divisors is an integer number (2081394720).

Almost surely, 2^22166851851 is an apocalyptic number.

22166851851 is a deficient number, since it is larger than the sum of its proper divisors (11135463669).

22166851851 is a wasteful number, since it uses less digits than its factorization.

22166851851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563383 (or 11563377 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The spelling of 22166851851 in words is "twenty-two billion, one hundred sixty-six million, eight hundred fifty-one thousand, eight hundred fifty-one".