19722253219 has 2 divisors, whose sum is σ = 19722253220. Its totient is φ = 19722253218.

The previous prime is 19722253183. The next prime is 19722253249. The reversal of 19722253219 is 91235222791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19722253219 - 2¹⁹ = 19721728931 is a prime.

It is a super-2 number, since 2×19722253219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19722253249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9861126609 + 9861126610.

It is an arithmetic number, because the mean of its divisors is an integer number (9861126610).

Almost surely, 2^19722253219 is an apocalyptic number.

19722253219 is a deficient number, since it is larger than the sum of its proper divisors (1).

19722253219 is an equidigital number, since it uses as much as digits as its factorization.

19722253219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The spelling of 19722253219 in words is "nineteen billion, seven hundred twenty-two million, two hundred fifty-three thousand, two hundred nineteen".