18195694101 has 18 divisors (see below), whose sum is σ = 28459934178. Its totient is φ = 11197349280.

The previous prime is 18195694073. The next prime is 18195694117. The reversal of 18195694101 is 10149659181.

18195694101 is a `hidden beast` number, since 1 + 81 + 9 + 569 + 4 + 1 + 0 + 1 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1522170225 + 16673523876 = 39015^2 + 129126^2 .

It is not a de Polignac number, because 18195694101 - 2⁷ = 18195693973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195694171) 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 17 ways as a sum of consecutive naturals, for example, 5979970 + ... + 5983011.

Almost surely, 2^18195694101 is an apocalyptic number.

It is an amenable number.

18195694101 is a deficient number, since it is larger than the sum of its proper divisors (10264240077).

18195694101 is a wasteful number, since it uses less digits than its factorization.

18195694101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11963013 (or 11962997 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 45.

The spelling of 18195694101 in words is "eighteen billion, one hundred ninety-five million, six hundred ninety-four thousand, one hundred one".