1918373738192 has 40 divisors (see below), whose sum is σ = 3795267108936. Its totient is φ = 939141789696.

The previous prime is 1918373738189. The next prime is 1918373738209. The reversal of 1918373738192 is 2918373738191.

It can be written as a sum of positive squares in 4 ways, for example, as 138113316496 + 1780260421696 = 371636^2 + 1334264^2 .

It is a congruent number.

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, 5834303 + ... + 6154334.

Almost surely, 2^{1918373738192} is an apocalyptic number.

It is an amenable number.

1918373738192 is a deficient number, since it is larger than the sum of its proper divisors (1876893370744).

1918373738192 is a wasteful number, since it uses less digits than its factorization.

1918373738192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11988855 (or 11988849 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 62.

Subtracting 1918373738192 from its reverse (2918373738191), we obtain a palindrome (999999999999).

The spelling of 1918373738192 in words is "one trillion, nine hundred eighteen billion, three hundred seventy-three million, seven hundred thirty-eight thousand, one hundred ninety-two".