19420711853 has 2 divisors, whose sum is σ = 19420711854. Its totient is φ = 19420711852.

The previous prime is 19420711837. The next prime is 19420711861. The reversal of 19420711853 is 35811702491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14053391209 + 5367320644 = 118547^2 + 73262^2 .

It is a cyclic number.

It is not a de Polignac number, because 19420711853 - 2⁴ = 19420711837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19420711853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19420711873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9710355926 + 9710355927.

It is an arithmetic number, because the mean of its divisors is an integer number (9710355927).

Almost surely, 2^19420711853 is an apocalyptic number.

It is an amenable number.

19420711853 is a deficient number, since it is larger than the sum of its proper divisors (1).

19420711853 is an equidigital number, since it uses as much as digits as its factorization.

19420711853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 19420711853 in words is "nineteen billion, four hundred twenty million, seven hundred eleven thousand, eight hundred fifty-three".