19722253139 has 2 divisors, whose sum is σ = 19722253140. Its totient is φ = 19722253138.

The previous prime is 19722253121. The next prime is 19722253151. The reversal of 19722253139 is 93135222791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19722253139 - 2²⁰ = 19721204563 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19722253139.

It is not a weakly prime, because it can be changed into another prime (19722253339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9861126569 + 9861126570.

It is an arithmetic number, because the mean of its divisors is an integer number (9861126570).

Almost surely, 2^19722253139 is an apocalyptic number.

19722253139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19722253139 is an equidigital number, since it uses as much as digits as its factorization.

19722253139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The spelling of 19722253139 in words is "nineteen billion, seven hundred twenty-two million, two hundred fifty-three thousand, one hundred thirty-nine".