19020718091 has 2 divisors, whose sum is σ = 19020718092. Its totient is φ = 19020718090.

The previous prime is 19020718021. The next prime is 19020718097. The reversal of 19020718091 is 19081702091.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19020718091 is a prime.

It is not a weakly prime, because it can be changed into another prime (19020718097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9510359045 + 9510359046.

It is an arithmetic number, because the mean of its divisors is an integer number (9510359046).

Almost surely, 2^19020718091 is an apocalyptic number.

19020718091 is a deficient number, since it is larger than the sum of its proper divisors (1).

19020718091 is an equidigital number, since it uses as much as digits as its factorization.

19020718091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 38.

The spelling of 19020718091 in words is "nineteen billion, twenty million, seven hundred eighteen thousand, ninety-one".