1918373738193 has 24 divisors (see below), whose sum is σ = 3023230313376. Its totient is φ = 1162520611200.

The previous prime is 1918373738189. The next prime is 1918373738209. The reversal of 1918373738193 is 3918373738191.

1918373738193 is a `hidden beast` number, since 1 + 9 + 1 + 8 + 373 + 73 + 8 + 193 = 666.

It is not a de Polignac number, because 1918373738193 - 2² = 1918373738189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1918373738193.

It is not an unprimeable number, because it can be changed into a prime (1918373738173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191880 + ... + 1968137.

It is an arithmetic number, because the mean of its divisors is an integer number (125967929724).

Almost surely, 2^{1918373738193} is an apocalyptic number.

It is an amenable number.

1918373738193 is a deficient number, since it is larger than the sum of its proper divisors (1104856575183).

1918373738193 is a wasteful number, since it uses less digits than its factorization.

1918373738193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169005 (or 2169002 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 1918373738193 in words is "one trillion, nine hundred eighteen billion, three hundred seventy-three million, seven hundred thirty-eight thousand, one hundred ninety-three".