19953820067 has 2 divisors, whose sum is σ = 19953820068. Its totient is φ = 19953820066.

The previous prime is 19953820043. The next prime is 19953820109. The reversal of 19953820067 is 76002835991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19953820067 - 2¹⁰ = 19953819043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19953819997 and 19953820024.

It is not a weakly prime, because it can be changed into another prime (19953820267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9976910033 + 9976910034.

It is an arithmetic number, because the mean of its divisors is an integer number (9976910034).

Almost surely, 2^19953820067 is an apocalyptic number.

19953820067 is a deficient number, since it is larger than the sum of its proper divisors (1).

19953820067 is an equidigital number, since it uses as much as digits as its factorization.

19953820067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 19953820067 in words is "nineteen billion, nine hundred fifty-three million, eight hundred twenty thousand, sixty-seven".