19103678197 has 2 divisors, whose sum is σ = 19103678198. Its totient is φ = 19103678196.

The previous prime is 19103678183. The next prime is 19103678207. The reversal of 19103678197 is 79187630191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11404317681 + 7699360516 = 106791^2 + 87746^2 .

It is a cyclic number.

It is not a de Polignac number, because 19103678197 - 2¹¹ = 19103676149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19103678147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9551839098 + 9551839099.

It is an arithmetic number, because the mean of its divisors is an integer number (9551839099).

Almost surely, 2^19103678197 is an apocalyptic number.

It is an amenable number.

19103678197 is a deficient number, since it is larger than the sum of its proper divisors (1).

19103678197 is an equidigital number, since it uses as much as digits as its factorization.

19103678197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 52.

The spelling of 19103678197 in words is "nineteen billion, one hundred three million, six hundred seventy-eight thousand, one hundred ninety-seven".