1838190927393 has 20 divisors (see below), whose sum is σ = 2746239733908. Its totient is φ = 1225326644640.

The previous prime is 1838190927329. The next prime is 1838190927401. The reversal of 1838190927393 is 3937290918381.

1838190927393 is a `hidden beast` number, since 1 + 8 + 38 + 190 + 9 + 27 + 393 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 601698078864 + 1236492848529 = 775692^2 + 1111977^2 .

It is not a de Polignac number, because 1838190927393 - 2⁶ = 1838190927329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1838190927393.

It is not an unprimeable number, because it can be changed into a prime (1838190927493) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 492246 + ... + 1979567.

Almost surely, 2^{1838190927393} is an apocalyptic number.

It is an amenable number.

1838190927393 is a deficient number, since it is larger than the sum of its proper divisors (908048806515).

1838190927393 is an equidigital number, since it uses as much as digits as its factorization.

1838190927393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481006 (or 2480997 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 1838190927393 in words is "one trillion, eight hundred thirty-eight billion, one hundred ninety million, nine hundred twenty-seven thousand, three hundred ninety-three".