19000002001 has 2 divisors, whose sum is σ = 19000002002. Its totient is φ = 19000002000.

The previous prime is 19000001983. The next prime is 19000002011. The reversal of 19000002001 is 10020000091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18927155776 + 72846225 = 137576^2 + 8535^2 .

It is an emirp because it is prime and its reverse (10020000091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19000002001 is a prime.

It is a super-2 number, since 2×19000002001² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19000002011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9500001000 + 9500001001.

It is an arithmetic number, because the mean of its divisors is an integer number (9500001001).

Almost surely, 2^19000002001 is an apocalyptic number.

It is an amenable number.

19000002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19000002001 is an equidigital number, since it uses as much as digits as its factorization.

19000002001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 19000002001 its reverse (10020000091), we get a palindrome (29020002092).

The spelling of 19000002001 in words is "nineteen billion, two thousand, one".