18419435085 has 16 divisors (see below), whose sum is σ = 29970607680. Its totient is φ = 9657194880.

The previous prime is 18419435081. The next prime is 18419435093. The reversal of 18419435085 is 58053491481.

It is a happy number.

It is not a de Polignac number, because 18419435085 - 2² = 18419435081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18419435081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10405576 + ... + 10407345.

It is an arithmetic number, because the mean of its divisors is an integer number (1873162980).

Almost surely, 2^18419435085 is an apocalyptic number.

18419435085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18419435085 is a deficient number, since it is larger than the sum of its proper divisors (11551172595).

18419435085 is a wasteful number, since it uses less digits than its factorization.

18419435085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20812988.

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 18419435085 in words is "eighteen billion, four hundred nineteen million, four hundred thirty-five thousand, eighty-five".