18871823134 has 16 divisors (see below), whose sum is σ = 29014716816. Its totient is φ = 9203040000.

The previous prime is 18871823077. The next prime is 18871823141. The reversal of 18871823134 is 43132817881.

It is a super-2 number, since 2×18871823134² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 683667 + ... + 710734.

It is an arithmetic number, because the mean of its divisors is an integer number (1813419801).

Almost surely, 2^18871823134 is an apocalyptic number.

18871823134 is a deficient number, since it is larger than the sum of its proper divisors (10142893682).

18871823134 is a wasteful number, since it uses less digits than its factorization.

18871823134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394571.

The product of its digits is 258048, while the sum is 46.

The spelling of 18871823134 in words is "eighteen billion, eight hundred seventy-one million, eight hundred twenty-three thousand, one hundred thirty-four".