18931365106 has 8 divisors (see below), whose sum is σ = 28399018284. Its totient is φ = 9465025680.

The previous prime is 18931365077. The next prime is 18931365119. The reversal of 18931365106 is 60156313981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12687994881 + 6243370225 = 112641^2 + 79015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291585 + ... + 350548.

Almost surely, 2^18931365106 is an apocalyptic number.

18931365106 is a deficient number, since it is larger than the sum of its proper divisors (9467653178).

18931365106 is a wasteful number, since it uses less digits than its factorization.

18931365106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656876.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 18931365106 in words is "eighteen billion, nine hundred thirty-one million, three hundred sixty-five thousand, one hundred six".