18168356770 has 16 divisors (see below), whose sum is σ = 32749706808. Its totient is φ = 7256972800.

The previous prime is 18168356749. The next prime is 18168356777. The reversal of 18168356770 is 7765386181.

It can be written as a sum of positive squares in 4 ways, for example, as 15990361209 + 2177995561 = 126453^2 + 46669^2 .

It is not an unprimeable number, because it can be changed into a prime (18168356777) 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 7 ways as a sum of consecutive naturals, for example, 1288879 + ... + 1302898.

Almost surely, 2^18168356770 is an apocalyptic number.

18168356770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18168356770 is a deficient number, since it is larger than the sum of its proper divisors (14581350038).

18168356770 is a wasteful number, since it uses less digits than its factorization.

18168356770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592485.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 18168356770 in words is "eighteen billion, one hundred sixty-eight million, three hundred fifty-six thousand, seven hundred seventy".