19748070197 has 2 divisors, whose sum is σ = 19748070198. Its totient is φ = 19748070196.

The previous prime is 19748070193. The next prime is 19748070233. The reversal of 19748070197 is 79107084791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18747360241 + 1000709956 = 136921^2 + 31634^2 .

It is a cyclic number.

It is not a de Polignac number, because 19748070197 - 2² = 19748070193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19748070193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9874035098 + 9874035099.

It is an arithmetic number, because the mean of its divisors is an integer number (9874035099).

Almost surely, 2^19748070197 is an apocalyptic number.

It is an amenable number.

19748070197 is a deficient number, since it is larger than the sum of its proper divisors (1).

19748070197 is an equidigital number, since it uses as much as digits as its factorization.

19748070197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 53.

The spelling of 19748070197 in words is "nineteen billion, seven hundred forty-eight million, seventy thousand, one hundred ninety-seven".