18169343955 has 32 divisors (see below), whose sum is σ = 36915494400. Its totient is φ = 8305985376.

The previous prime is 18169343953. The next prime is 18169343981. The reversal of 18169343955 is 55934396181.

It is not a de Polignac number, because 18169343955 - 2¹ = 18169343953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18169343953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9612465 + ... + 9614354.

It is an arithmetic number, because the mean of its divisors is an integer number (1153609200).

Almost surely, 2^18169343955 is an apocalyptic number.

18169343955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18169343955 is an abundant number, since it is smaller than the sum of its proper divisors (18746150445).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18169343955 is a wasteful number, since it uses less digits than its factorization.

18169343955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19226840 (or 19226834 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The spelling of 18169343955 in words is "eighteen billion, one hundred sixty-nine million, three hundred forty-three thousand, nine hundred fifty-five".