19470920243 has 2 divisors, whose sum is σ = 19470920244. Its totient is φ = 19470920242.

The previous prime is 19470920237. The next prime is 19470920297. The reversal of 19470920243 is 34202907491.

It is a weak prime.

It is an emirp because it is prime and its reverse (34202907491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19470920243 - 2¹⁸ = 19470658099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19470920243.

It is not a weakly prime, because it can be changed into another prime (19470920543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9735460121 + 9735460122.

It is an arithmetic number, because the mean of its divisors is an integer number (9735460122).

Almost surely, 2^19470920243 is an apocalyptic number.

19470920243 is a deficient number, since it is larger than the sum of its proper divisors (1).

19470920243 is an equidigital number, since it uses as much as digits as its factorization.

19470920243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 19470920243 in words is "nineteen billion, four hundred seventy million, nine hundred twenty thousand, two hundred forty-three".