1804198620193 has 2 divisors, whose sum is σ = 1804198620194. Its totient is φ = 1804198620192.

The previous prime is 1804198620173. The next prime is 1804198620199. The reversal of 1804198620193 is 3910268914081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1784757058704 + 19441561489 = 1335948^2 + 139433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1804198620193 is a prime.

It is a super-2 number, since 2×1804198620193² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1804198620193.

It is not a weakly prime, because it can be changed into another prime (1804198620199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902099310096 + 902099310097.

It is an arithmetic number, because the mean of its divisors is an integer number (902099310097).

Almost surely, 2^{1804198620193} is an apocalyptic number.

It is an amenable number.

1804198620193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804198620193 is an equidigital number, since it uses as much as digits as its factorization.

1804198620193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 1804198620193 in words is "one trillion, eight hundred four billion, one hundred ninety-eight million, six hundred twenty thousand, one hundred ninety-three".