19472218243 has 2 divisors, whose sum is σ = 19472218244. Its totient is φ = 19472218242.

The previous prime is 19472218211. The next prime is 19472218261. The reversal of 19472218243 is 34281227491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19472218243 - 2⁵ = 19472218211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19472218243.

It is not a weakly prime, because it can be changed into another prime (19472210243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736109121 + 9736109122.

It is an arithmetic number, because the mean of its divisors is an integer number (9736109122).

Almost surely, 2^19472218243 is an apocalyptic number.

19472218243 is a deficient number, since it is larger than the sum of its proper divisors (1).

19472218243 is an equidigital number, since it uses as much as digits as its factorization.

19472218243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The spelling of 19472218243 in words is "nineteen billion, four hundred seventy-two million, two hundred eighteen thousand, two hundred forty-three".