18782178738 has 16 divisors (see below), whose sum is σ = 37566866880. Its totient is φ = 6260308016.

The previous prime is 18782178721. The next prime is 18782178749. The reversal of 18782178738 is 83787128781.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 931 + ... + 193817.

It is an arithmetic number, because the mean of its divisors is an integer number (2347929180).

Almost surely, 2^18782178738 is an apocalyptic number.

18782178738 is an abundant number, since it is smaller than the sum of its proper divisors (18784688142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18782178738 is a wasteful number, since it uses less digits than its factorization.

18782178738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209121.

The product of its digits is 8429568, while the sum is 60.

The spelling of 18782178738 in words is "eighteen billion, seven hundred eighty-two million, one hundred seventy-eight thousand, seven hundred thirty-eight".