19380391211 has 2 divisors, whose sum is σ = 19380391212. Its totient is φ = 19380391210.

The previous prime is 19380391183. The next prime is 19380391273. The reversal of 19380391211 is 11219308391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19380391211 - 2²² = 19376196907 is a prime.

It is not a weakly prime, because it can be changed into another prime (19380321211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9690195605 + 9690195606.

It is an arithmetic number, because the mean of its divisors is an integer number (9690195606).

Almost surely, 2^19380391211 is an apocalyptic number.

19380391211 is a deficient number, since it is larger than the sum of its proper divisors (1).

19380391211 is an equidigital number, since it uses as much as digits as its factorization.

19380391211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 19380391211 in words is "nineteen billion, three hundred eighty million, three hundred ninety-one thousand, two hundred eleven".