18195694099 has 16 divisors (see below), whose sum is σ = 21414054240. Its totient is φ = 15274754560.

The previous prime is 18195694073. The next prime is 18195694117. The reversal of 18195694099 is 99049659181.

It is a cyclic number.

It is not a de Polignac number, because 18195694099 - 2¹¹ = 18195692051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18195694009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908044 + ... + 927865.

It is an arithmetic number, because the mean of its divisors is an integer number (1338378390).

Almost surely, 2^18195694099 is an apocalyptic number.

18195694099 is a deficient number, since it is larger than the sum of its proper divisors (3218360141).

18195694099 is a wasteful number, since it uses less digits than its factorization.

18195694099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835990.

The product of its (nonzero) digits is 6298560, while the sum is 61.

The spelling of 18195694099 in words is "eighteen billion, one hundred ninety-five million, six hundred ninety-four thousand, ninety-nine".