18838673919 has 12 divisors (see below), whose sum is σ = 29304604056. Its totient is φ = 11593030032.

The previous prime is 18838673813. The next prime is 18838673921. The reversal of 18838673919 is 91937683881.

18838673919 is a `hidden beast` number, since 188 + 3 + 8 + 67 + 391 + 9 = 666.

It is not a de Polignac number, because 18838673919 - 2¹¹ = 18838671871 is a prime.

It is a super-2 number, since 2×18838673919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18838673969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80507037 + ... + 80507270.

It is an arithmetic number, because the mean of its divisors is an integer number (2442050338).

Almost surely, 2^18838673919 is an apocalyptic number.

18838673919 is a deficient number, since it is larger than the sum of its proper divisors (10465930137).

18838673919 is a wasteful number, since it uses less digits than its factorization.

18838673919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161014326 (or 161014323 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 18838673919 in words is "eighteen billion, eight hundred thirty-eight million, six hundred seventy-three thousand, nine hundred nineteen".