19198218707 has 2 divisors, whose sum is σ = 19198218708. Its totient is φ = 19198218706.

The previous prime is 19198218691. The next prime is 19198218731. The reversal of 19198218707 is 70781289191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19198218707 - 2⁴ = 19198218691 is a prime.

It is not a weakly prime, because it can be changed into another prime (19198218007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9599109353 + 9599109354.

It is an arithmetic number, because the mean of its divisors is an integer number (9599109354).

Almost surely, 2^19198218707 is an apocalyptic number.

19198218707 is a deficient number, since it is larger than the sum of its proper divisors (1).

19198218707 is an equidigital number, since it uses as much as digits as its factorization.

19198218707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 53.

The spelling of 19198218707 in words is "nineteen billion, one hundred ninety-eight million, two hundred eighteen thousand, seven hundred seven".