19847475383 has 2 divisors, whose sum is σ = 19847475384. Its totient is φ = 19847475382.

The previous prime is 19847475379. The next prime is 19847475419. The reversal of 19847475383 is 38357474891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19847475383 - 2² = 19847475379 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19847475083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9923737691 + 9923737692.

It is an arithmetic number, because the mean of its divisors is an integer number (9923737692).

Almost surely, 2^19847475383 is an apocalyptic number.

19847475383 is a deficient number, since it is larger than the sum of its proper divisors (1).

19847475383 is an equidigital number, since it uses as much as digits as its factorization.

19847475383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 59.

The spelling of 19847475383 in words is "nineteen billion, eight hundred forty-seven million, four hundred seventy-five thousand, three hundred eighty-three".