18713871388 has 12 divisors (see below), whose sum is σ = 34675702992. Its totient is φ = 8806527680.

The previous prime is 18713871331. The next prime is 18713871431. The reversal of 18713871388 is 88317831781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137601928 + ... + 137602063.

It is an arithmetic number, because the mean of its divisors is an integer number (2889641916).

Almost surely, 2^18713871388 is an apocalyptic number.

It is an amenable number.

18713871388 is a deficient number, since it is larger than the sum of its proper divisors (15961831604).

18713871388 is a wasteful number, since it uses less digits than its factorization.

18713871388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275204012 (or 275204010 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 55.

The spelling of 18713871388 in words is "eighteen billion, seven hundred thirteen million, eight hundred seventy-one thousand, three hundred eighty-eight".