67820213819 has 2 divisors, whose sum is σ = 67820213820. Its totient is φ = 67820213818.

The previous prime is 67820213771. The next prime is 67820213843. The reversal of 67820213819 is 91831202876.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67820213819 is a prime.

It is a super-2 number, since 2×67820213819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67820213849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33910106909 + 33910106910.

It is an arithmetic number, because the mean of its divisors is an integer number (33910106910).

Almost surely, 2^67820213819 is an apocalyptic number.

67820213819 is a deficient number, since it is larger than the sum of its proper divisors (1).

67820213819 is an equidigital number, since it uses as much as digits as its factorization.

67820213819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 67820213819 in words is "sixty-seven billion, eight hundred twenty million, two hundred thirteen thousand, eight hundred nineteen".