18838461676138 has 16 divisors (see below), whose sum is σ = 30442241287080. Its totient is φ = 8691566014656.

The previous prime is 18838461676063. The next prime is 18838461676141. The reversal of 18838461676138 is 83167616483881.

It can be written as a sum of positive squares in 4 ways, for example, as 16427189984209 + 2411271691929 = 4053047^2 + 1552827^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129451093 + ... + 129596536.

Almost surely, 2^{18838461676138} is an apocalyptic number.

18838461676138 is a deficient number, since it is larger than the sum of its proper divisors (11603779610942).

18838461676138 is a wasteful number, since it uses less digits than its factorization.

18838461676138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259050441.

The product of its digits is 222953472, while the sum is 70.

The spelling of 18838461676138 in words is "eighteen trillion, eight hundred thirty-eight billion, four hundred sixty-one million, six hundred seventy-six thousand, one hundred thirty-eight".