6721842019 has 2 divisors, whose sum is σ = 6721842020. Its totient is φ = 6721842018.

The previous prime is 6721842011. The next prime is 6721842079. The reversal of 6721842019 is 9102481276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6721842019 - 2³ = 6721842011 is a prime.

It is a super-2 number, since 2×6721842019² = 90366320256787992722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6721842011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360921009 + 3360921010.

It is an arithmetic number, because the mean of its divisors is an integer number (3360921010).

Almost surely, 2^6721842019 is an apocalyptic number.

6721842019 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721842019 is an equidigital number, since it uses as much as digits as its factorization.

6721842019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 6721842019 is about 81986.8405233425. The cubic root of 6721842019 is about 1887.2499986357.

The spelling of 6721842019 in words is "six billion, seven hundred twenty-one million, eight hundred forty-two thousand, nineteen".