201919740019 has 2 divisors, whose sum is σ = 201919740020. Its totient is φ = 201919740018.

The previous prime is 201919739999. The next prime is 201919740023. The reversal of 201919740019 is 910047919102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201919740019 is a prime.

It is a super-2 number, since 2×201919740019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201919743019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100959870009 + 100959870010.

It is an arithmetic number, because the mean of its divisors is an integer number (100959870010).

Almost surely, 2^201919740019 is an apocalyptic number.

201919740019 is a deficient number, since it is larger than the sum of its proper divisors (1).

201919740019 is an equidigital number, since it uses as much as digits as its factorization.

201919740019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 201919740019 in words is "two hundred one billion, nine hundred nineteen million, seven hundred forty thousand, nineteen".