1840393187819 has 2 divisors, whose sum is σ = 1840393187820. Its totient is φ = 1840393187818.

The previous prime is 1840393187803. The next prime is 1840393187839. The reversal of 1840393187819 is 9187813930481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1840393187819 - 2⁴ = 1840393187803 is a prime.

It is a super-2 number, since 2×1840393187819² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1840393187839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920196593909 + 920196593910.

It is an arithmetic number, because the mean of its divisors is an integer number (920196593910).

Almost surely, 2^{1840393187819} is an apocalyptic number.

1840393187819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840393187819 is an equidigital number, since it uses as much as digits as its factorization.

1840393187819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The spelling of 1840393187819 in words is "one trillion, eight hundred forty billion, three hundred ninety-three million, one hundred eighty-seven thousand, eight hundred nineteen".