18872117170 has 16 divisors (see below), whose sum is σ = 34526694168. Its totient is φ = 7425095040.

The previous prime is 18872117149. The next prime is 18872117171. The reversal of 18872117170 is 7171127881.

It can be written as a sum of positive squares in 4 ways, for example, as 14149816209 + 4722300961 = 118953^2 + 68719^2 .

It is not an unprimeable number, because it can be changed into a prime (18872117171) 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, 15468339 + ... + 15469558.

Almost surely, 2^18872117170 is an apocalyptic number.

18872117170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18872117170 is a deficient number, since it is larger than the sum of its proper divisors (15654576998).

18872117170 is a wasteful number, since it uses less digits than its factorization.

18872117170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30937965.

The product of its (nonzero) digits is 43904, while the sum is 43.

The spelling of 18872117170 in words is "eighteen billion, eight hundred seventy-two million, one hundred seventeen thousand, one hundred seventy".