19819034237 has 2 divisors, whose sum is σ = 19819034238. Its totient is φ = 19819034236.

The previous prime is 19819034219. The next prime is 19819034309. The reversal of 19819034237 is 73243091891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14089452601 + 5729581636 = 118699^2 + 75694^2 .

It is a cyclic number.

It is not a de Polignac number, because 19819034237 - 2¹⁴ = 19819017853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19819034191 and 19819034200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19819034437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9909517118 + 9909517119.

It is an arithmetic number, because the mean of its divisors is an integer number (9909517119).

Almost surely, 2^19819034237 is an apocalyptic number.

It is an amenable number.

19819034237 is a deficient number, since it is larger than the sum of its proper divisors (1).

19819034237 is an equidigital number, since it uses as much as digits as its factorization.

19819034237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 19819034237 in words is "nineteen billion, eight hundred nineteen million, thirty-four thousand, two hundred thirty-seven".